blank pcb,s can any one id these please

[FIXITNOW]

picked these up in 2 large boxes of 60's nos componets
can anyone id them or have any info on the kits they were part off please

[Yorkie]

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.

[pwdrive]

No: 1 Could be part of an audio kit supplied by the long defunct Crescent Radio of London.

No: 2 Looks like a 2+1 valve amp (2 audio, 1 rectifier), the four square PCB cut outs to the right looks like where the PSU filter cap might fit? Two of the valves appear to have series connected heaters. Maybe record player amp?

Dunno about the other two.

Lawrence.

[Refugee]

I have about half a dozen NOS PCBs that came as cover projects from ETI in the 1980s/1990s.
If anyone is interested I can put some photos up for ID.

[pwdrive]

My guess is a mono push pull amp, 2 x UCL82 + UY85.

Lawrence.

[Keithstv]

I suspect it is a push pull amp and here's my lunchtime interpretation of the circuit. The area in the green block I suspect could be some form of resistor module as there isn't a resistor from V1 grid to ground tracked in.

I've also forgotten to put the pentode suppressor grids in but they are connected to the cathodes.

Any ideas which record palyer it would have been fitted to?

Keith

[Keithstv]

The third one looks like a radio PCB with the large hole with 3 equally spaced smaller holes round it. You can also see sets of pads laid out for probably the circular Weyrad type IFTs and oscillator coil.

Keith

[pwdrive]

Don't know which record player, the PCB could be a manufacturers overun but the 2+1/1 might suggest a kit, maybe based on the 7 watt push pull Mullard design but less the UF86?

Lawrence.

[pwdrive]

The third one looks like a radio PCB with the large hole with 3 equally spaced smaller holes round it. You can also see sets of pads laid out for probably the circular Weyrad type IFTs and oscillator coil.

Keith

Yes, well spotted, could be the holes for the tuning gang.

Lawrence.

[pwdrive]

No: 4, Fidelity record player?

Lawrence.