JTM30 output transformer

wrightyk6 · 08:38 PM

Hi,

I have just bought a Hammond 1750NA output transformer as a direct replacement for my Marshall JTM30. Does anyone which colour wires connect where as the transformers differ in appearance??????

Alastair E · 4th May 2011, 08:45 PM

What does the maker's website say or the info that came with the Tx...?

wrightyk6 · 4th May 2011, 08:50 PM

Quote:

Originally Posted by Alastair E

What does the maker's website say or the info that came with the Tx...?

the 1750NA is a new product & therefore no info on the website. I have emailed them but no reply so far

Matt.B.H. · 4th May 2011, 10:34 PM

Hello wrightyk6,
Hammonds usual wiring scheme is:

Blue and Brown- Anodes
Blue/Yellow and Brown/Yellow- Screens for UL connection, I guess you dont have or need these.
Red- HT

As for the secondary I have no idea as Hammond have decided on some easy wire thing lately, which actually makes them less usefull for people that like to mis-wire them.

Hope this helps.

Cheers Matt.

4th May 2011, 08:31 PM	#1
wrightyk6 diyAudio Member Join Date: May 2011	JTM30 output transformer Hi, I have just bought a Hammond 1750NA output transformer as a direct replacement for my Marshall JTM30. Does anyone which colour wires connect where as the transformers differ in appearance?????? Last edited by wrightyk6; 4th May 2011 at 08:38 PM.

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4th May 2011, 08:45 PM	#2
Alastair E diyAudio Member Join Date: Feb 2004 Location: South Wales	What does the maker's website say or the info that came with the Tx...?

4th May 2011, 10:34 PM	#4
Matt.B.H. diyAudio Member Join Date: Jul 2009 Location: Cheltenham	Hello wrightyk6, Hammonds usual wiring scheme is: Blue and Brown- Anodes Blue/Yellow and Brown/Yellow- Screens for UL connection, I guess you dont have or need these. Red- HT As for the secondary I have no idea as Hammond have decided on some easy wire thing lately, which actually makes them less usefull for people that like to mis-wire them. Hope this helps. Cheers Matt.

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