I can take that 2nd 5U4G tube.
Incoming PM.
You can get Trafo covers from eBay. https://www.ebay.com/itm/203542302637
@rhythmdevils I can check the amp if you can send it.
Yes, the tubes are 6B4G which is an octal version of 6A3. Driver tube is 6SL7.
Discrete amp is Sapphire v4.1 from RJM Audio, with some tweaks on bias from my side. 6SL7/6B4G amp is get-set-go amp from Shannon Parks, which is...
i have a spare USB to coax converter, Douk audio U2 pro.
The amp @rhythmdevils is talking about is Sapphire v4.1, I have built quite a few and it really comes close and bests some of the known TOTLs....
I think channel imbalance and loud noise could be due to ground not connected to one of the channels. If the noise doesnt change in loudness with...
@vzamayoa should be able to help with the table.
If you can do little of DIY, X-LS encore can be built for ~$500, and it has enough low end to fill 16x16 room.
Will be there on Sunday.
A better approach would be use an XLR to SE cable and utilize one-half of balanced signal out of DAC. A typical xlr input on SE amp could be...
Black silk HD650 actually sounds quite different and preferably better to me than current gen, so worth checking it out. I can leave Tubelab SE as...
I would be interested in meetup, can bring along Elekit TU-8200, Tubelab SE 300B, HD580, Black silk HD650.
Would be interested to join too.
Attempting DIY at entry level is not so rewarding with companies offering good sounding amp/dacs at $100, used ones go for even cheaper pricing....
For my builds I was matching transistors within 10-20 in terms of hfe values. With that and some bias adjustment I used to get around 0 with...
Both whammy and sapphire v4 are excellent amps, I can tell from my experience in building those.. Whammy: Simple build based on single PCB, opamp...
There is Discrete dynamics power amp design listed here (comes as fully populated PCB with heatsink attached): FS: Discrete Dynamics Class A/B...
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