[R-390] NOS Hammond 600 Ohm to 9 Ohm Audio Transformers

Bob Camp ham at cq.nu
Wed Oct 31 05:56:25 EST 2007


Hi

They are a lot better thing to use than the "single tap" transformers  
you see running around. Matching impedances isn't a bit deal with  
solid state gear, but it does matter on something like an R390

Bob


On Oct 30, 2007, at 10:33 PM, James A. (Andy) Moorer wrote:

> This seems like a good time to remind folks of the following:
>
> I have a crate of NOS Hammond 39921 transformers with 600 ohm
> primary. The secondary has 6 taps. One at 9 ohms. There are taps at  
> a bit
> over 4 and a bit over 2 ohms, plus some others. Works great for R-390
> series, SP-600, CA-88 and others. These were made for the military
> contractor Marsland Eng. Ltd.
>
> $10 plus shipping, which is generally about $5. Breaks for 3 or more.
>
> Apologies for the blatantly commercial email, but it does relate to  
> R-390s and these transformers seem to be getting harder to find.
>
> James A. (Andy) Moorer
> www.jamminpower.com
>
>
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