need help identifying some parts??????????????

[marrstians]

what are these?? the little glass things?


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[niftydog]

glass thingys are potentially neons or even spark gaps. What's the circuit?

the other thingy, no idea, hard to tell from just one angle. It's made by these guys though! Possibly a DC-DC convertor...

Sorry to say that it's the end of the day for me so that's as much help as I can give you for a few days! Sorry! I had a guess!

[Stuart]

They look like LCR polystyrene caps.

[Mark F]

I concur with Stuart. they are polystyrene caps.

[Peter Snowberg]

I'll triple the concurance.

Those caps are about as good as it gets without getting into aerospace quality caps. Their only downside is that they typically have very small diameter leads which can be fragile. A blop of silicone sealer gets around that. Polystyrene also doesn't like heat so they're usually not used in tube amps.

I was going to guess DC-DC for the second pic, but a quick scan of the OEP web site makes it look more like it's an encapsulated audio transformer.

http://www.oep.co.uk/audio_transformers/miniature_encapsulated_input.html

[mikeb]

Is that the Lovetone ring modulator you got there?    :wink:

Mike

[Dan N]

This page mentions the OEP 1200:

http://www.oep.co.uk/line_isolation_transformers/line_isolation_transformers.html

[marrstians]

close... the wobulator

[Peter Snowberg]

You can pull an almost identical transformer with possibly limited bandwidth just by desoldering one from an old modem. It's just a 600 ohm 1:1 isolation transformer.

[Lonestarjohnny]

Wobulator ?
would I love that Pedal  til Death do us Part !
Johnny

[marrstians]

polystyrene caps? is that just a different material for a normal cap, like tant or film? what would be the benefit of using one of these?

[mikeb]

Yeah, I thought I recognised the caps from Lovetones I've worked on in the past - the dopps I've seen use those x-wing stompswitches (shudder)...

Mike

[Peter Snowberg]

There are many different "films" used:

Polyester - cheap films like "greenies" (I love 'em!)
Polyethylene terephthalate - better cheap caps like MKT series
Polypropylene - very low dielectric losses and good temperature stability - good for high current
Polycarbonate - super high temperature stability & low loss at high frequency
Polystyrene - high tempearature stability & low tolerance spread - high ESL (like greenies!)
Polytetrafluoroethylene - a.k.a. Teflon - super temp capability - Aerospace/medical grade
Polywantacracker -