Duf Two Stroke amp

[Sticky Sam]

I have just built a Two Stroke amp with 8" an 10" speakers. Switch on, valves light up. No sound, no hum. I have found another thread here with a similar problem, am reading through it now. Any ideas/help much appreciated.

[Jazz P Bass]

Without more information, such as a schematic and basic voltage measurements, there is not much to add.

Other than triple check your work.

[Jazz P Bass]

Hunter Two Stoke

Here is a layout diagram that I found.

Here is a link where the OP lists a few voltages that may help.
Link: NOS GE 6V6GT Plate Voltage in my SE homebrew is 425v... too high? - The Gear Page

[Sticky Sam]

Jazz P
That is the same wiring as my amp. I read through the other thread you posted. This one sound more of a problem with high voltage, his amp works.
Tubes
V1 - ECC83S
V2 - 6V6 S
V3 - No socket at V3
V4 - 5Y3 S

Spares - I also have 6L6GC and EL34 spare.

[Mick Bailey]

No hum suggests your 6V6 isn't conducting, or the output is open circuit. After checking the solder joints it could be;

Miswired
No plate voltage
No screen voltage
Missing cathode connection
Incorrect cathode resistor value.

Is there any HT output from the rectifier? Tubes lighting up just means your 6.3v is present. You need to check the voltage with a multimeter, then check each pin of the output tube base measured to ground and post back the results. Take care not to short anything with your meter probe.

[Jazz P Bass]

Where you sent a schematic?

That Layout Drawing is a friggin nightmare to follow.

You will need to take a few static (no signal applied) voltage readings.(referenced to ground)
V1: pins 1 & 3/ 6 & 8 (Plate & Cathode)
V2: Pins 2 & 7 (Heaters)
Pins 3 & 4 (B+ & Screen)
Pin 8 (Cathode)
V4: Pin 8 B+

[Sticky Sam]

Does this work/come out?

[g1]

Yes that worked. The first thing I noticed is the impedance switch. Any issues there and the speaker becomes disconnected.
Post the voltages JazzP mentioned, also the supply voltages marked on the schematic as A, B, and C.

[Sticky Sam]

g-one

Right ho. Will check impedance switch first. Off to find a multimeter.