Gotta get these records
As it says in the top RH corner:
"Featuring 800 tracks, the deluxe version of the Paramount Records set includes lavishly illustrated books and tortoiseshell (!) LPs housed in phonograph-style "wonder cabinet".
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Gotta get these records
As it says in the top RH corner:
"Featuring 800 tracks, the deluxe version of the Paramount Records set includes lavishly illustrated books and tortoiseshell (!) LPs housed in phonograph-style "wonder cabinet".
Attachment 11198Here's the machine of the Rowe-Ami amp seen on the previous page, as depicted in the manual:
..and the preamp and power amp.
Find I have to rewind both output transformers.
Fortunately I've done them in the past, and therefore have the data.
Saves unwinding one to obtain that data, the most time consuming part.
Here's the '50's mono Wurlitzer amp with push-pull 6L6s.
In the bench shot I've already replaced the twenty assorted necessary caps on that board..
This is the amp with the modulated oscillator phono pickup system.
It's now up and running with new modern capacitors as nec.
Those 6L6s do a great job on the sensitive bunch of electro-mag speakers in that machine. Really powers out. Certainly would rock the joint mono or not.
That strange pickup system is really sensitive. You'd never get past half up on the pot for normal level. Special tool (or pair of tiny-pointed pliers) to adjust the volume.
That's so the customers can't surruptiously crank up the volume and blow everyone out of the joint.
Well, find I have to rewind both output transformers.
My friend Richard who owns it says: No matter the cost, get it up and running.
He knows I am not about to be a rip-off.
Hope all viewers to this thread have a very enjoyable and tuneful Christmas and New Year.
Jack.
....and the same to you Jack.
All the best Jack. I really enjoy this thread and am astounded by your knowledge of this kind of kit. It's just so far away from any hi-fi I have experience of that it's difficult for me to comment upon. Have a great Christmas.
Attachment 11258Dug up this shot for another site:
As an aside, do you notice that for the same pixels that shot comes up bigger on the other guys than over here?
http://www.skirtcafe.org/forums/view...16515&start=15
Just checked, but does not seem to be on sale yet.
Attachment 11259This here cabinet has an eight inch speaker.
In a big open backed cabinet.
In those conditions you don't want a too floppy speaker.
What happens is that the cabinet reinforses the bass, while the smaller cone blasts out less of the rest.
Real basic 1933 superhet with rare and special Wonderlich detector tube (globe shape blue Acturus of course) and type 45 output tube.
It certainly sounds better than later ones with 12" speakers.
Sound's great for follwing the cricket, where we have convincingly trounced the West Indies in the serious test series.
Hard to find any music on the AM band these days.
I got chatting to a bright and cheery woman in the supermarket queue today, who is doing a Phd. We were talking about the brain and keeping it active. I said I wasn't about to retire and was still designing and building valve amplifiers. She had never heard of a valve. I said things sound better on a valve amplifier. I showed her my camera and said even my YouTube videos sound better on my valve amplifier. She was amazed.
Managed to get a good seat at the excellent "Civic" venue here in Auckland. In April the concert is. Certainly something to look forward to in 2014, which I reckon is going to be a good year.
About that time last year I was lucky enough to get a good seat there for Manhattan Transfer. That was certainly a good show.
Be spending some time absorbing live music, and general holidaying. Some transformer winding will be on though. There's a jukebox to sort, and David's Yank amp.
Preamp power supplies and BSEA amps to boot. About sixteen altogether with two BSEA amps. That should keep me entertained for a bit.
Meanwhile, there are three free jazz concerts to film for me YouTube channel, plus WOMAD, and other stuff. I am needed. I was the only one to cover the Bollywood stage at the Diwali Festival Of Light on YouTube. OK only Bollywood, but very popular all the same on TV.
There's the Chinese New Year Lantern Festival too, complete with unique music.
Not exactly HiFi, but not bad, and...captured.
http://www.youtube.com/watch?v=3LSZTJz1l68
http://www.youtube.com/watch?v=VWIIMUcQBFU
Those clips are basically recordings of the bands' PAs, not so much live unprocessed.
The only ones I have to date of live natural sound is a bunch of fun videos I made on my old Canon camera at Waikawau Bay a couple of summers ago of some cavorting in the surf.
The surf high frequencies are certainly really good.
I'm not so sure about this newer one, which does have the wider screen, but the sound I have not yet tested under the same conditions. But also, I think that Silkboby dress could do with another cavort.
http://www.youtube.com/watch?v=BqpaBeRBtUs
Attachment 11294Tomorrow off with it's OPTs.
Attachment 11295No flies on the blokes who designed this little amp.
Notice the two channels are at right angles to maximise separation.
Some local jazz musos at the Auckland Domain yesterday.
http://www.youtube.com/watch?v=KZLZrmnNF_4
http://www.youtube.com/watch?v=NFjuw3sRbxs
http://www.youtube.com/watch?v=ezRwUB9RJ38
Going to the supermarket today there was this lovely girl promoting funds for the Paralympics :
Attachment 11360
Attachment 11363That lovely West Indian girl took this shot. Hard to comment really.
A very nice set from Quantum Blue.
http://www.youtube.com/watch?v=PgJpe3JxaA0
http://www.youtube.com/watch?v=x-O4iKQJ_1I
http://www.youtube.com/watch?v=GweENdA4cA0
http://www.youtube.com/watch?v=idRc1XPMWV0
Actually, I seem to be the only one covering these events on video, so look out for more of such clips..
Attachment 11403Newly rewound trannies go on tomorrow.
Attachment 11431Refurbished with change to EL84s, rewound OPTs and whatever, this is a very fine little amp.
It has fixed bias and is definitely a lot better than a Leak Stereo 20.
Attachment 11477The green monster has now been stripped out except for the 845s and sockets for new all triode front end and also valve voltage doubler power supply installed. The input RCAs were where I put the pretty green electro cans, the inputs now on the back.
It really becomes a Murray Dick amp, and no relationship to whoever it was that concieved it in the first place.
Meanwhile there is the Ecofan Sound "Super-Audion MKIV", inherited from "family".
I shall upgrade it to the new front end of 417a to 437a driver. A great grunt amp for my outdoor JBLs. Even in the triode mode.
It has type 6550s in the output and radiometal OPTs. Ulta-linear and triode modes.
Hard to say where these clips stand in the annals of HiFi, but I have to say, listening to these two clips recorded at Sunday's free jazz gig sound pretty good to me on the type50s.
This time I was somewhat further back (zoomed) so the camera would not be so compressed by the sound level. I think you can notice the difference.
These are the two that I have so far got uploaded out of a total of eight that day:
I have to say how good it is to see how many kiddies are being exposed to jazz music in these clips.
http://www.youtube.com/watch?v=h6Ew6ETz9uo
http://www.youtube.com/watch?v=KPtVlj3DxEY
See how these clips sound.
They had the most powerful, and the crystal clearest PA I have ever enjoyed. Headroom to Mars.
http://www.youtube.com/watch?v=tBNn3zVNNzY
http://www.youtube.com/watch?v=iSuOPxNSN3c
http://www.youtube.com/watch?v=XeG2mglGKRM
Attachment 11655Attachment 11654Rick Bryant and The Jive Bombers.
http://www.youtube.com/watch?v=Ge2FZ...re=c4-overview
Well, I did make a few clips of another old legend of Kiwi rock & poll, but the sound quality turned out less than optimal shall we say:
Midge Marsden.
http://www.youtube.com/watch?v=wuHtJ...re=c4-overview
Sorry, the sound is abismal. I don't know why I bother sometimes.
This might be better:
http://www.youtube.com/watch?v=XfuAu...T3AsZ6Ly5S-iIQ
http://www.youtube.com/watch?v=ASA-X...T3AsZ6Ly5S-iIQ
Lost it there, but did make a few clips at a gig the other day.
See how I go:
..But it's hard to beat vaccuum tubes with push-pull power output.
Circa 1932, this set would have cost about the price of a car in those days. A Model T at least.
Ten tubes, three short wave bands, plus local and distance AM.
Two IF stages, push-pull type 47s. The audeo certainly is great.
Can't say it's going yet. Have to get some data unfortunately to unravel unusual circuitry in detector/IF teritory.
Playing at Auckland's Domain Wintergarden.
http://www.youtube.com/watch?v=tH0bI...T3AsZ6Ly5S-iIQ
Pokey Lafarge.
https://www.youtube.com/watch?v=Wnu0...T3AsZ6Ly5S-iIQ
Sochy Olympics coming up.
http://www.bbc.com/news/world-europe-26265230
Big OTL I built some time ago.
In with his Lamm preamp, had to replace all the five toggle switches on the front of the Lamm with quality ones as seen in Ecofan Boost-its, but used the flat toggle ones.
OTL needed a couple of new silicon diodes.
hi all,
otl above is a heavyweight beast indeed -
definitely a two man lift....
a
Certainly for you and me Adam, but Allan swung that thing around like a toy!
Are those 6080 output valves? What output power do you get from that?
:cool: Alan
hi alan,
the otl is running 6080's and is a 30W stereo model - murray's
take on the circlotron; below is otl in monoblock form...
regards,
adam
Attachment 12114
Yes that's about the power of the big one as with that many 6080s there would be too much heat if too much HT voltage used. Would have been better as monoblocks.
Those monoblocks with four a side therefore give about 20WRMS each with somewhat more HT.
I like them better, and may even do more of them.
I found with the OTLs that even though they do like, 5HZ to 100KHZ they sounded bass heavy unless wired with 1mm silver wire. Then the tops keep up with the bass to listen to although on instruments just the same. So all those beasts are wired in the silver.
6080s get really hot with their 2.5amp heaters and high current low voltage HT.
What is this?
http://www.skirtcafe.org/forums/view...701&start=1050
hi,
sorry murray - but that link just leads to
the login page of skirtcafe.org - sadly the
discussion of otls is not visible....
also - just registered with skirtcafe but
it won't let me visit the linked post...
cheers,
a
Try this link again Adam.
http://www.skirtcafe.org/forums/view...701&start=1050
Just checked it, still works.
Maybe they are miffed with me for standing up to the bullshit!
Here's a link to the second page:
http://www.skirtcafe.org/forums/view...701&start=1065
Otherwise it's under "Pics and Looks": "Jack Track".
Or from here:
https://www.facebook.com/murray.dick.52?ref=tn_tnmn
Attachment 12342Adam was prevented from accessing this thread of mine on the Skirtcafe, so I have taken these screen shots which should enable the drift to be got. Me under attack!