In Reply to: RE: So... posted by Alex Kitic on October 26, 2014 at 13:54:17:
Just to expand on what Alex is describing... You will need to be sure the electronic transformer (power oscillator) has a toroidal transformer at its output. The modules I've purchased in the past used miniature conventional transformers, much more difficult to modify (I wouldn't try). Searching eBay recently, I did find a few sellers that post pics of the inside of their modules, and several show a toroidal design in that position. Also, just to be clear, Alex is telling you to add a CT to the output transformer in order to power the filament. I assume the CT will be grounded, just as in the case of a 60Hz filament transformer.
Alex, I'm pretty sure you said recently that you've found some of the electronic transformers that are already designed to oscillate at 50 or 60 kHz. All the modules I've purchased ran at roughly 20 kHz, so I had to modify them. Can you point us to a specific seller for this? In my case at least, it would need to have a 120V primary, not 220V.
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Follow Ups
- Alex... - Triode_Kingdom 18:23:28 10/26/14 (12)
- RE: Alex... - Alex Kitic 22:31:13 10/26/14 (11)
- RE: Alex... - Lew 10:02:57 10/27/14 (0)
- RE: Alex... - Alex Kitic 03:46:46 10/27/14 (9)
- RE: Alex... - Triode_Kingdom 08:53:24 10/27/14 (8)
- RE: Alex... - Alex Kitic 11:42:41 10/27/14 (7)
- RE: Alex... - Al Noakes 12:50:27 10/27/14 (6)
- RE: Alex... - Alex Kitic 13:07:58 10/27/14 (5)
- RE: Alex... - Al Noakes 14:25:07 10/27/14 (4)
- RE: Alex... - Alex Kitic 22:23:27 10/27/14 (2)
- RE: Alex... - Triode_Kingdom 07:29:20 10/28/14 (1)
- RE: Alex... - Alex Kitic 14:18:43 10/28/14 (0)
- 10A Transformer - Triode_Kingdom 20:28:08 10/27/14 (0)