Tube Amp Archive

Amps ready, and everything works (except I need to reverse the tone control). Sounds good, without noise or interference. Will give the amp some playing time before any fine-tuning (like bias resistor). Seems like this layout works well.

Some pics of the work so far. Changes compared to V-1-3 schematics:
- No C1 cap at power intake
- Fixed 230V PT primary
- Fuses added (mains, pilot lamp, and B+)
- "Marshall style" High/Low inputs with 68k grid stoppers

Using a "Merlin style" ground scheme.

Late to the party on this one, but I'm interested to know how it turns out! Seems like EF 86 might need special damping. I haven't worked with EF86, but several Dr. Z amps use them and often have the rubber dampers that fit around the bottle. I have wondered about using thick squishy rubber washers...

A question on choke for AC-10, related to my clone build. Found the enclosed schematics (circuit 05/008, date 9-9-60) where choke is 8 H. In the schematics I've used so far (V-1-3, see post #1) the choke is 5 H. ... You already have your parts. That said, the choke on my 1965 AC-10 is a 5H unit. Th...

Got the parts for my build, most of them from Modulus Amplification. Now it's "dry'fitting" to realise the AC-10 schematics in this "Marshall-style" layout.

Edit: Pic's in reverse order for some reason.

A question on choke for AC-10, related to my clone build. Found the enclosed schematics (circuit 05/008, date 9-9-60) where choke is 8 H. In the schematics I've used so far (V-1-3, see post #1) the choke is 5 H. No other difference as I can see (except 0,005 µF instead of 0,0047 µF), even voltage th...

Both inputs are LOW. By that I mean plugging into either jack sends the signal through a 2:1 voltage divider (two 220Ks). Only one half the guitar signal will reach the tube grid. Believe it or not, when that amp was built people would actually use the dual inputs to connect two instruments to a ch...

Anyone who can comment on the wiring of the inputs according to the Vox AC-10, V-1-3, schematics I'm using (see post #1)? Hi and Lo inputs for each channel (Normal and Vibrato) seems to be identical, i.e. same grid stopper resistance (220k) regardless if plugg into Hi or Lo. What's the point with tw...

I've done something similar with the AC-15. Lot of similarities. Lot of differences. Take a look. Maybe you can find something useful... https://sluckeyamps.com/VAC15/ac15.htm https://sluckeyamps.com/dual_lite/dual_lite.htm I noticed the shielded wires from inputs. Any other measures to avoid inter...

I've done something similar with the AC-15. Lot of similarities. Lot of differences. Take a look. Maybe you can find something useful... https://sluckeyamps.com/VAC15/ac15.htm https://sluckeyamps.com/dual_lite/dual_lite.htm Thanks a lot! That's really well documented. Need some time to study how yo...

Hello, newcomer to the forum here. I'm planning to build a clone of Vox AC-10, using the V-1-3 schematics below. Inspiration is the YouTube video below by Johan Segeborn (missed to buy that amp when it was for sale). Looks like 6 noval sockets: EZ81 (rectifier), EF 86 (or EF 806S), ECF 82, ECC 83, a...