Just found these in a drawer. ?PreII OPTs?

[Guy Pettigrew]

While hunting for something else these two beauties turned up at the back of a drawer.

They are probably output transformers from my old PreII, but they may not be!

Whatever they are, I vaguely remember wrapping the silver adhesive tape round them to minimise hum, or something!

They have D8773 and 5/03 handwritten on them.

Are they worth trying to sell?

Guy

[audiopete]

If intending to sell on, I could well be interested.

Currently got a elma 24 way switch and have pre-amp build lights going off in my mind.

PRE II specs - Used in our pre-amplifier module, the PREII. Secondary:primary ratio is 6:1, so is a step down transformer. High quality, excellent for driving long interconnects. Maximum current is 15mA, can be used with a 6922 valve (one triode section only). It measures 80mm(w) x 60mm(l) x 65mm(d).

[Ali Tait]

They look very like Pre 2 trannies.

[John Caswell]

They are indeed Pre II optxs and if used will require the specified Zobel network on the output side to reduce the ringing. Keep far away from other power txs as they were VERY susceptible to magnetic field pickup

John

[Guy Pettigrew]

Thanks Dr John and Ali tait.

I've just PM'd you, Mr audiopete, as you expressed an interest in them.

Oh, and Happy New Year, everyone!

Guy

[audiopete]

Hi Guy,

PM'd with additional info for you.

[Shane]

I'll be interested to see what you do with those. I've got a pair sitting out in the shed waiting for an idea to come along.

[Ali Tait]

This perhaps?

http://www.world-designs.co.uk/forum...read.php?t=144

[Greg.]

Originally Posted by Ali Tait

This perhaps?

http://www.world-designs.co.uk/forum...read.php?t=144

Oooo, Ali, is that a serious suggestion or are you being very cynical?

That FAQ thread was introduced, offering a conversion option on Pre II to remove the original Tx's as for many of us, they were a source of hum. See what John posted above on requirements for a quiet application. For many of us this was not feasible. After building the Pre II trio, initially I felt conned because they didn't enhance my sound whatsoever. At first I converted to passive input which worked but sounded a bit flat but I was later delighted to adopt Neal Gibbon's adaption of the Morgan Jones CF design, especially because it brought the sparkle back into the music. I'm still using and loving it

[Ali Tait]

No, not at all! I haven't looked into it, so didn't realise the trannies were no longer used. I don't doubt it sounds very good. Thought about trying it with mine, but have Pre3 now, and am happy with it for now, and it would be a shame to dismantle the 2, it's got a lot of expensive bits in it, so I'll probably sell it.