The first one looks like a stereo headphone amplifier, possibly using two LM380 ICs.
The second one appears to have pads to accept three B9A PCB mounting valveholders - again, possibly for a small stero amplifier, using perhaps one valve as a driver to drive a pair of EL84s for example.
Pure guesswork on my part - other forum members might have better ideas. Pity the circuits aren't available - there will undoubtably be those who'd enjoy making and using such modules.
Poor though it was in comparison to glassfibre PCB material, NOS unused SRBP PCB sheet is in demand by those who make copies of 60s and 70s special effects modules for guitar amps - fuzz boxes etc. Crudely made simply devices, which have their appeal for those who like retro stuff.
I think forum member 'Pepsi' who hasn't posted for a while makes and markets such units.
The second one appears to have pads to accept three B9A PCB mounting valveholders - again, possibly for a small stero amplifier, using perhaps one valve as a driver to drive a pair of EL84s for example.
Pure guesswork on my part - other forum members might have better ideas. Pity the circuits aren't available - there will undoubtably be those who'd enjoy making and using such modules.
Poor though it was in comparison to glassfibre PCB material, NOS unused SRBP PCB sheet is in demand by those who make copies of 60s and 70s special effects modules for guitar amps - fuzz boxes etc. Crudely made simply devices, which have their appeal for those who like retro stuff.
I think forum member 'Pepsi' who hasn't posted for a while makes and markets such units.
Regards, David.
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
