Mod your Beresford 7520

[Dougr33]

I sent him the picture from here so he sees how much lateral room there is.. I don't know crap, but maybe the filter can end up on the side of the op amp instead of sitting on top.

[leo]

The pins used on the Browndogs would probably be more suitable http://cimarrontechnology.com/so8to8...rpn970601.aspx

The pins with the black plastic are a lot taller

If it was me I'd just remove the 8pin socket and solder the 4032 converter board direct to the pcb, to save headaches just use the lm4562, it may not be quite as good but be less hassle for those unable to sort the space issue out

[trailer]

I for another don't think it was a gravy train issue. We've all been trying different "modifications" out over the months with varying degrees of success, some DIY, some getting the "DIY done for us". I guess at the end of the day the profit margin on the 4032s that Tirna have been selling must have been a few quid each. If he sold twenty then that's probably enough for a tank of petrol never mind a Rolls Royce.

[sponge]

OK guys, here are a couple of pictures showing the "original" BrownDog adapter which I used to mount the THS4032 and ceramic capacitor:

http://farm4.static.flickr.com/3556/...aa01dd.jpg?v=0

http://farm4.static.flickr.com/3244/...ebf3a7.jpg?v=0

Here is the adapter with the chip and cap fitted:

http://farm4.static.flickr.com/3322/...df015a.jpg?v=0


The distance from the underside of the adapter to the top of the capacitor is 5.5mm - So when it is installed in the TC-7520 socket(s) there is ample clearance between the cap and the case cover.

What I have also done is removed the sub-pcb by cutting away all the hot-melt gunge and sticky pad and trimmed all the component leads to allow the pcb to sit slightly (abot 2mm) lower. Of course I insulated the 2 caps on the main board with bits of tape before re-fitting the sub-pcb. There were also one or two solder joints I re-flowed to allow me to seat a couple of components firmer.

Hope this is of some use.

Ken

[mwahahaha]

That's much more like it Ken, it's missing the black plastic feet that jack mine up those precious few mm!

I might ask Tirna to solder the whole shabang to the board and remove the socket as I'm more than happy with the 4032. I'll be dac-less for a few days but if I can get the lid back on it'll be all good.

[HighFidelityGuy]

On the subject of power supplies, here's something interesting I found last night:
Never-Connected Power supply

Unfortunately you can't buy them as a diy add-on. The manufacturer licenses out the use of the technology to other manufacturers. So perhaps this is something Stan could look into. I've go no idea on price.

Edit: I spoke to soon, you can buy these as an add-on from Trichord. You can spec the output specifications to suit your needs and they're available in black or silver. Still no mention of price though. I'll try and find out.

[Covenant]

That's much more like it Ken, it's missing the black plastic feet that jack mine up those precious few mm!

I might ask Tirna to solder the whole shabang to the board and remove the socket as I'm more than happy with the 4032. I'll be dac-less for a few days but if I can get the lid back on it'll be all good.

Not the route that I want to go down. I want to be able to try other op-amps as and when they become available. Has anyone asked Tirna whether the capacitor can be mounted to one side (if this gives enough clearance)?

[HighFidelityGuy]

Alternatively someone could ask Tirna to use the same type of pins as on the BrownDog version. Or, as I mentioned before, you could remove the black plastic spacers and trim the pins shorter.

[StanleyB]

On the subject of power supplies, here's something interesting I found last night:
Never-Connected Power supply

Unfortunately you can't buy them as a diy add-on. The manufacturer licenses out the use of the technology to other manufacturers. So perhaps this is something Stan could look into.

Why? Are you implying their technology would offer more benefits than the Dual Power Supply circuit I designed for the TC-7510 and TC-7520? Or is this a case of jumping on someone else's bandwagon?
I prefer to innovate, not copy others blindly, especially when I have a problem with the marketing blurb that hides the technical realities behind a product.

[HighFidelityGuy]

Why? Are you implying their technology would offer more benefits than the Dual Power Supply circuit I designed for the TC-7510 and TC-7520? Or is this a case of jumping on someone else's bandwagon?
I prefer to innovate, not copy others blindly, especially when I have a problem with the marketing blurb that hides the technical realities behind a product.

It's certainly not my intention to imply their design is better than yours, that is something you can investigate if you wish. You've stated yourself that the opamps supplied with the 7520 can be improved upon and that the PSU supplied with the 7520 can be improved upon. I'm simply bringing a possible alternative to a standard PSU to everyone's attention. It's up to you and everyone else to decide if it's worth trying or not.

Just for clarification. When I say the PSU of the 7520, I'm talking about the transformer that plugs in the mains. Not the internal PSU of the 7520.