WAD Transformer Numbers Help Please

[pre65]

Can anyone tell me any specifications on D8773 which were output transformers on Pre 2.

I have acquired a pair and wonder what use I can put them to.

[Desmodromic]

Originally Posted by audiopete

Hi all,

just to add the following for WAD Kel34

Mains Tx - Gold Seal Tor 251

Output Tx - D8530

I suspect that these part numbers relate to the E/I version. I have the earlier toroid output transformers on the amp that I'm currently restoring. The part nos are:

Mains Tx - as above Gold Seal Tor 251
Output Tx - YE620PB (mine are also marked B/N 19319

Hope this helps someone someday

[Phil Y]

I have a 6550 here with:

Mains 7546 batch 11/04
O/P 7731 Hi88 4.5 P-P/4R batch 11/04
Choke 7500 6550/34 batch 07/04

Phil.

[greg2010]

I have a pair of 300B PP mono's in bits.

Mains: D8756

Output: Design No. 7636 4K / 6R

Choke: D8755 10H 150mA

All dated 2003 with gold writing on black paper.

[Sjselectro]

I have an SE 6550/KT88 amp I have been asked to sort out, does anybody have details on the mains transformer:

Design No. 7545
6550 Mains
batch 80/02

133 mm wide
111 mm deep
104 mm high, of which 65 mm stack

looks like a 248 lamination configured as a drop through with a chrome plated cap

many thanks

[bob orbell]

SE, I cant think that WAD or WD made such a thing, 300B yes, but not 6550/KT88. Bob

[Sjselectro]

Originally Posted by bob orbell

SE, I cant think that WAD or WD made such a thing, 300B yes, but not 6550/KT88. Bob

I would agree, I can't find any evidence of an SE 6550 amp, but possibly the mains transformer was used for something else first, then re-purposed?

I would like to find the spec of the mains tx if possible

[bob orbell]

If this is any help, the WAD mains transformer is as follows, primary - brown orange in parallel with red blue for 120v join brown and red - blue and orange, for 240 join orange and red, brown live blue 0v, secondary - black black white - 420-0-420 35mA this is for rectification ( thermionic ) purple - purple 5v 6amp for valve rec. heaters, grey - yellow - grey 3.15-0-3.15 9amp for all other heaters. Bob

[Sjselectro]

Many thanks Bob

The mains tx, chassis and valve layout makes me think this was a KAT6550 which somebody decided to re-purpose.

[bob orbell]

Glad to be of help. Bob