The Amp Garage

Telefunken EL84

Great!
Thank you guys for the help.

Hi. I have Blackface Dual Showman from 1966 with Dual Showman output transformer 022897. I'm not sure is this originaly there or somebody replace that. Shoud I also change the last resistor in NFB loop? I measured 100R as it shoul be in Dual Showman, but with Showman output transformer should I chan...

On my JM50 I did these mods: 1. Vintage Fender power transformer from vintage Super Reverb 2. Tube rectifier and the first power capacitor is 2x50uF in series 3. Removed capacitor on Reverb pot 4. 120K instead of 220K on reverb output 5. Added gain structure 3 way switch 6. Old Fender output transfo...

Once I had the same situation, it was loose connection on main power switch.
Try to move all mains wires with chopestick and listen.

I used Pelican 1400 mounting plate to mount utracer top plate to the pelican case, check attached image.
Also on the external heater supply there is small BT board, so you can use Andorid or PC to adjust heater parameters.
For USB I used FTL USB to serial adapter.

For sure, build!
Here my freshly made enclosure in black pelican case

From the back you will be able to tell because it will be labeled Proline if i'm not mistaken. Again this is just my limited knowledge. Why do you ask? I have one old EV 12L but I'm not sure if its 200W or 300W version https://live.staticflickr.com/65535/51919499669_1ec7e158e5_o_d.jpg https://live....

Is there any visual difference between standard EV12L 200W vs 300W?

Also one more newbie question.
Is this board compatible with utracer 6 and do i need this board at all with version 6?
I know Ronald made some changes in grid circuit on this version 6.

I'm interested, just finished my utracer 6
but I'm in Europe, so shipping will be probably expensive
Can you make one populated board or a kit and sell me, that will make more sense to pay extra shipping across the pond

Looking at the pictures of a real Bloomfield drive and rootz schematic I can see couple of small differences. 1. Mixing resistor shoul be 270K 2. Snubbers caps in OD channel, not in original amp 3. No Deep switch in schematic 4. No 1nF cap on 220K in Reverb circuit 5. 110K /110K + 10K pot in schemat...

I put my LNFB on a toggle switch