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Radford Revival
11-12-2016, 15:42
Paul of Reference Fidelity Components has commissioned me to build him an STA25! Clearly a man of exquisite taste in amplification ;)

I thought it would be nice to document the process of building it to showcase the parts used and effort taken.

I didn't start taking photos from the very beginning but the amp starts out as a chassis surround, and I begin bolting various bits on. The transformers and most of the amp circuitry sit on a sub chassis made from brush stainless steel.

As you can see the main surround has a few basic bits mounted.
http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp1.jpg

Some of the wiring beneath has been done and the tails come up through grommeted holes ready for the transformers.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp2.jpg

Radford Revival
11-12-2016, 15:45
Here is the underside, where the basic PSU and mains wiring has been completed.
http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp3.jpg

This is another sub-assembly the Radfords use. The valve bases sit on their own "runners". These are made from bright annealed stainless steel.
http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp4.jpg

brian2957
11-12-2016, 15:49
High quality parts and beautiful workmanship Will . Paul's a lucky man :)

Macca
11-12-2016, 15:52
Is there any deviation from the original design or is it an exact copy?

Radford Revival
11-12-2016, 15:53
As has been sad ad infinitum, the output transformers are the most important component of a valve amplifier. The famous T2075 (a Radford designation) is used in the STA25. It is a heavily interleaved design (primary and secondary windings are wound in sections on top of each other to minimize leakage inductance). This allows circa 26dB of feedback to be used without stability issues. This results in very low distortion and a high damping factor.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp5.jpg

Of course one needs to power the thing. The mains transformers we use are particularly large, for a low temperature rise. You could get away with a transformer approximately 3/4 the size, but we choose not to. A nicety of the mains transformer is that it employs an electrostatic shield, to reduce any interference from primary to secondary windings.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp6.jpg

Radford Revival
11-12-2016, 15:55
Is there any deviation from the original design or is it an exact copy?

The audio circuitry is exactly as original, the only deviation is the addition of some resistors in the bias circuitry to protect against the wipers in the bias pots going open!

In addition, a few of the resistors have been up-rated in power as we of course have samples of originals that have run for many years, and you can clearly see on some where a bigger resistor would be of benefit.

As a circuit it's more than the sum of its parts so tweaking it will not yield much if any improvement.

Radford Revival
11-12-2016, 16:03
Speaking of circuitry, here are the set of completed PCBs (sans a few bits) destined for the amp. More pics to come, the amp has progressed from this, I just need to upload and take more pictures!

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp7.jpg

Radford Revival
11-12-2016, 16:25
Oops, here's one I forgot to upload earlier. Just shows the output transformers and runners mounted. Things have progressed much further than this, more pics to come soon.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp8.jpg

Reffc
11-12-2016, 16:35
Looking great Will. Your attention to detail and neatness are a credit to you which is one of the reasons I decided on a Radford Revival STA25. Looking forward to the updates! ;)

Radford Revival
11-12-2016, 16:36
Looking great Will. Your attention to detail and neatness are a credit to you which is one of the reasons I decided on a Radford Revival STA25. Looking forward to the updates! ;)

I thought it was the bribery :D

Reffc
11-12-2016, 16:51
I thought it was the bribery :D

....that as well!

Sovereign
11-12-2016, 17:20
Fantastic chaps, really interesting thread.

Radford Revival
11-12-2016, 17:37
Not the best pic, but if you look carefully you'll see that the mains transformer is not actually flush against the chassis, but sitting about 2mm above it. This is because I use a form of resilient mounting to reduce mechanical buzz. It is difficult to see but in the darker portions of the image you can see the transformer is sat on rubber washers.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp9.jpg


From the underside you can see there are also rubber washers, with large M5 penny washers to spread the load over the entirety of the rubber. The whole transformer is then "floating".

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp10.jpg

Here is the hardware I use to mount the mains transformer. I make the rubber washers myself with a CNC router.
http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp11.jpg

Radford Revival
11-12-2016, 17:50
Here are a couple of the boards that form part of the power supply.

The HT winding resistance of the mains transformer is very low. This causes pretty sharp charging pulses that cause some of the mechanical buzz. These resistors counteract that somewhat, as well as lowering the HT voltage a little bit. Better to have the heat generated outside of the transformer rather than inside it via a resistive winding. The HT winding is also fuse protected in the event of a catastrophic failure of a capacitor or rectifier diode.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp12.jpg

This board forms part of our new protection circuitry. The control part is on another board, this just houses a relay (440Vac rated), and an HT fuse for one channel.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp13.jpg

We have a big stock of stainless hardware (ignore the errant galvanized hex spacers in there, they are never used!). This is one of a few racks filled with lots various high quality fasteners.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp14.jpg

Reffc
11-12-2016, 18:15
If it wasn't for the green fuse board in the second from last picture Will, I'd say that was just nuts! :facepull::sofa:

Radford Revival
11-12-2016, 18:35
If it wasn't for the green fuse board in the second from last picture Will, I'd say that was just nuts! :facepull::sofa:

:doh: :D

IHP
11-12-2016, 18:49
Words from another Will......William Morris......Have nothing in your houses that you do not know to be useful or believe to be beautiful.

It truly is wonderful to see something built with such skill, knowledge and care. I believe you hit the Mr. Morris quote on both counts Will ! This will be a joy to own.

Firebottle
11-12-2016, 19:30
Here are a couple of the boards that form part of the power supply.

The HT winding resistance of the mains transformer is very low.........Better to have the heat generated outside of the transformer rather than inside it via a resistive winding.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp12.jpg



What I absolutely admire about your builds Will is the technical attention to detail. Above is an excellent approach and so impressive is to slot the pcb to ensure maximum cooling of the resistors :thumbsup:

struth
11-12-2016, 19:33
Indeed, a very classy build.

REXTON
11-12-2016, 19:37
I think your going to love the Radford Paul, they certainly make my MG 15" in your custom cabs sing :D

montesquieu
11-12-2016, 20:15
Gorgeous Will.

Hope one day you'll have a slot free to re-make my STA100 in similar impeccable fashion. :)

Radford Revival
11-12-2016, 20:37
Gorgeous Will.

Hope one day you'll have a slot free to re-make my STA100 in similar impeccable fashion. :)

Hi Tom,

There are developments on that front actually - not necessarily with your amp but others, watch this space as said developments will also apply to yours eventually!

Radford Revival
11-12-2016, 20:45
What I absolutely admire about your builds Will is the technical attention to detail. Above is an excellent approach and so impressive is to slot the pcb to ensure maximum cooling of the resistors :thumbsup:


Indeed, a very classy build.


I think your going to love the Radford Paul, they certainly make my MG 15" in your custom cabs sing :D


High quality parts and beautiful workmanship Will . Paul's a lucky man :)


Fantastic chaps, really interesting thread.


Words from another Will......William Morris......Have nothing in your houses that you do not know to be useful or believe to be beautiful.

It truly is wonderful to see something built with such skill, knowledge and care. I believe you hit the Mr. Morris quote on both counts Will ! This will be a joy to own.

Many thanks for all the kind words all! :)

Reffc
11-12-2016, 20:46
I think your going to love the Radford Paul, they certainly make my MG 15" in your custom cabs sing :D

A man of good taste! :D

Marco
11-12-2016, 21:25
Fantastic stuff, Will, as usual. What you've just shown is a veritable testament to the excellence of your products, clearly designed with passion, flair, expertise and sympathy to the innovative nature of the original. Arthur would be proud... ;)

You truly are an asset to the AoS community, mate, so keep up the good work! :thumbsup:

Marco.

Radford Revival
11-12-2016, 22:20
Fantastic stuff, Will, as usual. What you've just shown is a veritable testament to the excellence of your products, clearly designed with passion, flair, expertise and sympathy to the innovative nature of the original. Arthur would be proud... ;)

You truly are an asset to the AoS community, mate, so keep up the good work! :thumbsup:

Marco.

Thanks Marco :D I have lots more to post!

Marco
11-12-2016, 22:31
Excellent... Then keep it coming! :cool:

Marco.

sq225917
12-12-2016, 00:34
Love the detail on the build, top notch stuff.

tubehunter
12-12-2016, 09:31
Yes a lovely amp.

Just a shame with such skill you need to use circuit boards.
Point to point is much more functional in a valve amp.

Happy days

montesquieu
12-12-2016, 09:34
Yes a lovely amp.

Just a shame with such skill you need to use circuit boards.
Point to point is much more functional in a valve amp.

Happy days

I'm sure that's more of an opinion than a demonstrable fact, Duncan ... I find well laid out circuit boards reassuring in an amp purchase.

tubehunter
12-12-2016, 09:51
Not really, having designed and built many.

Reffc
12-12-2016, 10:08
Yes a lovely amp.

Just a shame with such skill you need to use circuit boards.
Point to point is much more functional in a valve amp.

Happy days

Please name these "functional" advantages Duncan.

I'm with Tom. It has no bearing on how something sounds plus components are PROPERLY supported on all of Will's builds. The PCBs are also of the heavy duty, high quality variety. Wouldn't you agree that it seems disingenuous to cast such dispersions on Will's work? He is a true professional who knows his stuff, not some amateur DIYer.

Gazjam
12-12-2016, 10:27
Not sure he was Paul?
Just offering an opinion, which is ok I'd have thought.

He said it was a lovely amp...and it is. :)
Enjoying the build thread Will, keep it up!

anthonyTD
12-12-2016, 10:33
Printed circuit and hardwired amps with the same design can indeed sound, and perform diffrently, however, a lot will depend on the layout, and type of board material used, I designed, and built amps using both technologies over the 20 odd years I have been in business, and I can say that done right, both topologies can perform exceptionaly well, however; some will undoubtably prefer the one method over the other, nothing wrong with that.
A...

Gordon Steadman
12-12-2016, 10:45
So long as it sounds good, who cares?:scratch:

Radford Revival
12-12-2016, 10:53
Well, I've been told! Time to re-do Paul's circuit boards in point-to-point, sorry Paul, the waiting time just went up by 6 months. Don't worry, the amp will be more functional :D

Firebottle
12-12-2016, 10:56
:lol: :eyebrows:

The Black Adder
12-12-2016, 10:58
After owning Andrews Radford and various other amps since I prefer point to point.

There is nothing wrong with PCB's per-say and I'd be quite happy with both but point to point IME does sound better but we are all different. :)

..in addition. The Radford is a very well made/designed thing and I've no doubt it will be stonking. This could very well be a 'final' amp for Paul.

It's also great to see it getting made. Great pics.

Reffc
12-12-2016, 11:05
Not sure he was Paul?
Just offering an opinion, which is ok I'd have thought.

He said it was a lovely amp...and it is. :)
Enjoying the build thread Will, keep it up!

All I asked was to name the "functional advantages". It was an opinion, which is fair enough, but the inference was that a "lovely amp" had somehow been spoiled, (a la "ship hull ruined for the sake of a halfpenny worth of tar") or short-changed by using a PCB, the design and specification of which, Duncan has no knowledge of whatsoever.

As Anthony suggests, properly done, and using well thought out topology, there's little reason for hard-wired to sound any better or be any more functional. The expectation amongst enthusiasts is for P-T-P everything because it looks nicer and takes longer, ergo must be "better" which is not always the case.

Don't worry Will, I'm perfectly happy to slum it and accept one of your PCB versions ;)...after all, the Emille was an inferior PCB design too :lol:

Radford Revival
12-12-2016, 11:16
Don't worry Will, I'm perfectly happy to slum it and accept one of your PCB versions ;)

A brave man to deal with such hardship :violin: :D

anthonyTD
12-12-2016, 11:20
Lets not spoil an otherwise great thread here folks!
IMHO there are genuine reasons why' in some cases either topolgy used to create the same product can sound diffrent, better ? but it will depend greatly on the materials used, and the demands of the circuit in question, and of course the ultimate goal of the designer.:)
A...

Radford Revival
12-12-2016, 11:31
More pics to come soon :)

brian2957
12-12-2016, 11:34
Where's the popcorn man ? Ah here he is :D :popcorn:

Radford Revival
12-12-2016, 16:19
Wiring HT choke...

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp15.jpg

Soldering up this side of the mains transformer. The choke gets in the way so this has to be done before adding it. I also add an RC spark suppressor to make life a bit easier for the switch.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp16.jpg

Choke installed. As you can see I had to get a bit creative in ways of fitting the new circuitry to the amp! Those are beefy M5 sized stacked hexagonal stand-offs, they are extremely rigid despite the total height. The originals actually had the HT resistors mounted on spare tags on the mains transformer. I added a (500Vac rated) fuse.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp17.jpg

spendorman
12-12-2016, 19:24
Beautiful amp. If I did not have an original STA25 III, I'd be tempted to buy one.

I seem to remember that some the very first production of STA25's suffered from mains transformer buzz. This was not due to poor winding of the transformer, but the sharp nature of the switching of the solid state rectifiers. A modification was devised, inserting some resistance in the HT circuit. I believe that this mod was then made standard on later STA25's. Indeed, mine has this.

Reffc
12-12-2016, 19:25
Wiring HT choke...

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp15.jpg

Soldering up this side of the mains transformer. The choke gets in the way so this has to be done before adding it. I also add an RC spark suppressor to make life a bit easier for the switch.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp16.jpg

Choke installed. As you can see I had to get a bit creative in ways of fitting the new circuitry to the amp! Those are beefy M5 sized stacked hexagonal stand-offs, they are extremely rigid despite the total height. The originals actually had the HT resistors mounted on spare tags on the mains transformer. I added a (500Vac rated) fuse.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp17.jpg

Lovely job Will and a crafty use of the hex stand-offs.

Radford Revival
12-12-2016, 20:08
Beautiful amp. If I did not have an original STA25 III, I'd be tempted to buy one.

I seem to remember that some the very first production of STA25's suffered from mains transformer buzz. This was not due to poor winding of the transformer, but the sharp nature of the switching of the solid state rectifiers. A modification was devised, inserting some resistance in the HT circuit. I believe that this mod was then made standard on later STA25's. Indeed, mine has this.

This is indeed what we do, as well as the rubber mounting. If you look closely at the PCB you'll see two 33 ohm resistors, both of these are wired in parallel. The original used a single 33 and it got HOT. This of course halves the dissipation while doubling the power rating. They still get toasty but are massively within their ratings, they are Welwyn vitreous enamel wirewound resistors that can cope with obscene temperatures. With the benefit of many years of hindsight, I personally suspect a lot of the problem is actually due to the acoustic nature of the shape of the amp. The rubber mounts do seem to help a lot as the transformer isn't so tightly acoustically coupled to the rest of the chassis.


Lovely job Will and a crafty use of the hex stand-offs.

Amazing what you can find if you fish around in the junkbox for long enough ;)

Radford Revival
12-12-2016, 21:33
Half of the protection circuitry installed. The other half yet to be installed is the "brain" (a brain of diodes and resistors)

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp18.jpg

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp19.jpg

JohnJo
12-12-2016, 22:30
Very interesting.

Ever thought of offering a kit version Will?

Radford Revival
13-12-2016, 17:02
Very interesting.

Ever thought of offering a kit version Will?

We are definitely thinking of offering a kit, not in STA25 guise, but a different design on a much simpler chassis. Target output will be around 40Wpc with extremely good performance. I have already designed the circuit which has some innovative features for real world noticeable improvements over many valve amps.

Radford Revival
13-12-2016, 17:10
To go into a bit more detail, the idea would be that it would be a lot easier to construct than a STA15/25 which are pretty labour intensive to build. This would be largely PCB based ( ;) ) without much wiring to do.

Arkless Electronics
13-12-2016, 17:21
There is no difference in sound between point to point wiring and PCB IMO.

I do offer, with certain things I make, to build them as either point to point wired or other methods... but I would say that in spite of the need to charge considerably more for the point to point version, there will be no difference in sound. Yer pays yer money and takes yer choice ;)

struth
13-12-2016, 17:21
What? No ptp via Edinburgh?:lol:

Reffc
13-12-2016, 18:26
To go into a bit more detail, the idea would be that it would be a lot easier to construct than a STA15/25 which are pretty labour intensive to build. This would be largely PCB based ( ;) ) without much wiring to do.

:eek: :doh:

Radford Revival
14-12-2016, 18:33
On a Radford, there are multiple secondary windings on the output transformer. Rather than a tapped winding, it uses a switch to reconfigure the secondary windings to produce the impedance match you want (4, 8 and 16 ohms). All windings are in use for all settings. This is more difficult to implement than a simple tapped winding like 90% of valve amplifiers use, but yields better results.

I used to absolutely hate wiring these switches, it's extremely fiddly. Only through sheer practice I can generally wire them in one go without messing it up!
http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp20.jpg

montesquieu
14-12-2016, 18:41
you need a 50p piece in the pic for scale Will ... fiddly little bugger I'm sure.

Radford Revival
14-12-2016, 18:57
you need a 50p piece in the pic for scale Will ... fiddly little bugger I'm sure.

Conveniently enough it happens to be about the size of a 50p piece ;)

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp21.jpg

Radford Revival
15-12-2016, 19:21
Protection circuit board populated and fitted.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp22.jpg

Output transformer secondary wired (the rainbow wires come from the switch as per the previous post)

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp23.jpg

Reffc
15-12-2016, 19:39
Lovely. Neat as a new pin Will. With workmanship like this, and an amplifier like this, it does make you wonder if people seeking one of the best PP amplifiers out there at the minute ought to look closer to home than places such as Italy, Germany, America or God forbid, China!

Radford Revival
15-12-2016, 19:39
Overall picture so far. This additional protection circuitry is a recent development. Paul's is the first production amplifier to use it.

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp24.jpg

Radford Revival
15-12-2016, 19:43
Lovely. Neat as a new pin Will. With workmanship like this, and an amplifier like this, it does make you wonder if people seeking one of the best PP amplifiers out there at the minute ought to look closer to home than places such as Italy, Germany, America or God forbid, China!

Many thanks Paul. This entire thread is a ruse by the way, I'm actually re-casing a Chinese eBay amp for you ;)

The Black Adder
15-12-2016, 19:44
Looking very nice, Will. :)

Reffc
15-12-2016, 19:53
Many thanks Paul. This entire thread is a ruse by the way, I'm actually re-casing a Chinese eBay amp for you ;)

Like this one?

https://i.ytimg.com/vi/tsFLESjm09o/maxresdefault.jpg

Radford Revival
15-12-2016, 19:54
Looking very nice, Will. :)

Many thanks :)

A note about the protection circuit.

It's extremely simple - but quite effective. It just watches the cathode current of each output valve. Because the average current in a Class-AB amplifier varies, it employs a time constant to ignore short term high current spikes from music, et cetera, but trigger on a longer term overcurrent / fault. There is actually a more accurate way to implement such a circuit, that will more or less ignore music current swings and only trigger on a fault, but the additional complexity would be hard to justify, when this already works quite well, and just consists of resistors, diodes and capacitors.

As well as this, each valve has a rapid response trip for severe faults that will bypass the time constant, to reduce any potential damage as much as possible.

spendorman
16-12-2016, 07:14
I was going to ask for more details about the protection, but you have beaten me to it, thank you.

spendorman
16-12-2016, 07:15
Lovely. Neat as a new pin Will. With workmanship like this, and an amplifier like this, it does make you wonder if people seeking one of the best PP amplifiers out there at the minute ought to look closer to home than places such as Italy, Germany, America or God forbid, China!

+1

southall-1998
16-12-2016, 10:26
Nice pictures, Will.

Do you also build ''Integrated'' versions of these Radfords too? Or, at least a Radford, with built in volume pot?

S.

Radford Revival
16-12-2016, 21:39
Nice pictures, Will.

Do you also build ''Integrated'' versions of these Radfords too? Or, at least a Radford, with built in volume pot?

S.

Thanks Shane.

Not at the present. It's a good idea but unfortunately not something we currently offer - future projects will likely feature an integrated type amplifier.

Radford Revival
16-12-2016, 21:41
Just for the record it is currently around about 9:40pm and I've been soldering on and off since this morning, and have now stopped for the day. The amp is getting there now but these things aren't half labour intensive to build. I'm tired! :zzz:

southall-1998
16-12-2016, 21:48
Thanks Shane.

Not at the present. It's a good idea but unfortunately not something we currently offer - future projects will likely feature an integrated type amplifier.


Thanks, Will. Wish I could come over someday, and hear the STA15!

S.

Radford Revival
16-12-2016, 22:00
Thanks, Will. Wish I could come over someday, and hear the STA15!

S.

You'd be welcome, depends what we have available :)

southall-1998
16-12-2016, 22:04
Where about in the South West are you located, Will?

S.

Radford Revival
16-12-2016, 22:10
Where about in the South West are you located, Will?

S.

North Cornwall. Not a million miles from Torquay!

southall-1998
16-12-2016, 22:22
Smashing! Thanks, Will.

S.

djdstone
18-12-2016, 22:54
We are definitely thinking of offering a kit, not in STA25 guise, but a different design on a much simpler chassis. Target output will be around 40Wpc with extremely good performance. I have already designed the circuit which has some innovative features for real world noticeable improvements over many valve amps.
When will that be available Will?

spendorman
19-12-2016, 07:01
I think I remember reading that a kit amplifier was available from Radford. Might have been on the Yahoo Radford Group, not sure.

Radford Revival
19-12-2016, 14:39
When will that be available Will?

Hopefully next year some time :)

Radford Revival
19-12-2016, 19:51
Frequency of pics went down a bit as I wanted to crack on, and now it's done ;)

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp25.jpg

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp26.jpg

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp27.jpg

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp28.jpg

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp29.jpg

http://www.radfordrevival.co.uk/wordpress/wp-content/uploads/2016/12/paulamp30.jpg

struth
19-12-2016, 19:55
Shocking!! ...ly good..... a masterclass in electronics building young man... Bravo

Firebottle
19-12-2016, 19:58
Wow - class personified :stalks:

The only thing that lets it down is the dual tag connection to the upper large capacitor in the last picture not being 90 degrees (only kidding Will :eyebrows:).

Fabulous :thumbsup:

Radford Revival
19-12-2016, 20:02
Wow - class personified :stalks:

The only thing that lets it down is the dual tag connection to the upper large capacitor in the last picture not being 90 degrees (only kidding Will :eyebrows:).

Fabulous :thumbsup:

Many thanks Alan, always appreciate your comments. Better go and fix those tags ;) :D


Shocking!! ...ly good..... a masterclass in electronics building young man... Bravo

Many thanks :)

walpurgis
19-12-2016, 20:06
Looks a treat! :)

Reffc
19-12-2016, 20:06
Wow - class personified :stalks:

The only thing that lets it down is the dual tag connection to the upper large capacitor in the last picture not being 90 degrees (only kidding Will :eyebrows:).

Fabulous :thumbsup:

:eek:

Take yourself outside this instant Will, and commit to self flagellation with some twin and earth until the insulation breaks down! After you receive medical attention, please ensure that such a shocking oversight is corrected to the nearest 15 seconds of angle. Thank you. :D

Looking great Will. There's a space eagerly waiting for it ;)

Radford Revival
19-12-2016, 20:13
:
Take yourself outside this instant Will, and commit to self flagellation with some twin and earth until the insulation breaks down!

Does it need to be live or not? :D

Reffc
19-12-2016, 20:18
No, but the ends need to be neatly trimmed and tinned ;)

The Black Adder
19-12-2016, 20:34
World class work, Will.

Looking bloody lovely, beautiful, sterling work.

Paul will be a happy bunny :)

Superb pictures too, great thread. :)