Anybody know this TELEFUNKEN SE transformer?

[GloBug]

Hey guys, I purchased these off eBay last winter. Wondering if any of you can tell me a bit more about them. Even wiring hookups. I'm thinking on building and RH84 with them, or something along those lines.

Model no BV-1163

Here is a picture and a quote from the original ad.

"2 VINTAGE SINGLE ENDED TELEFUNKEN OUTPUT TRANSFORMERS, FOR 6BQ5, ECL86, EL95 ETC....TYPE TUBES. THESE ARE HIGH QUALITY TRANSFORMERS, MADE IN GERMANY.

THESE TRANSFORMERS ARE IN GOOD WORKING AND COSMETIC CONDITION.

725gr WITHOUT PACKING MATERIAL."

[Tom Bavis]

4200 turns (whole primary) to 172 turns (whole secondary) gives 4700 : 8 Ohms, a bit higher once you add in winding resistance. Sounds good for 6V6 or any of the tubes mentioned. The tap on the primary is for a "hum-bucking" circuit - but adequate filtering is a better idea - ignore it. Tap on secondary will be 2 Ohms - not much use...

Sprechen zie deutsch?
gruen=green
blau=blue
weiss=white
gelb=yellow
schwartz=black
rot=red

[planet10]

Do they actually say Telefunken on them?

In my data i have a TFK & a grundig OPT that start with BV, but the rest of the number is much longer.

It is pretty easy to figure out what is what, just read it off the label. The windings give you the info needed to calculate the ratios, the primamry uses the skinner wire.



dave

Edit: Tom beat me to it, posting while i was making pretty picture

[planet10]

Originally Posted by Tom Bavis

... 4700 : 8 Ohms... Tap on secondary will be 2 Ohms - not much use...

Typically these German console OPTs were specced as 9400 for 4 & 8 (or 5 & 10), much higher than we use today, but likely so that they can use the same OPT for EL95 or ELL80.

dave

[DigitalJunkie]

I'm gonna make a wild guess,so take it with a grain of salt.

I'd say 1-2 is a primary winding(4000T),maybe even 1-3,with UL?..kinda strange ratio. Sometimes,IIRC,some OPT's had a choke section for the power supply wound on there also (perhaps 2-3.. 198Turns?) Perhaps that's the case here.

I'd guess that 4-5-6 are the secondary windings.(fewer windings of larger gauge wire)

You can figure out which winding is which with a DMM,the secondary windings will have similar,lowish resistance..The primary winding will be a higher resistance.

Dunno,just a guess.

Edit: What they said! ^^

[GloBug]

Thank you very much guys!

No they do not actually say Telefunken on them.

Looking forward to another project. I'll start a thread.

My first amp I built was a stereo Magnavox 142's, (PPP) with a few mods of coarse So I want to hear what all the SE fuss is about.

[planet10]

Here is the label on a known TFK opt (these out of a tape deck IIRC)



dave

[GloBug]

Though it looks similar, its a little different, looks to have the same text and maybe assembled at a common factory.

The little black and white photo you attached in your earlier post looks identical to the picture in my first post.

Thanks for the upload. AL

[planet10]

Originally Posted by GloBug

The little black and white photo you attached in your earlier post looks identical to the picture in my first post.

It is from the picture you posted. I just added the translations and cropped out the label.

dave

[GloBug]

Wha wha whaaa.