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Radioroslyn
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Posts: 7,294
Threads: 268
Joined: Dec 2009
City: Roslyn Pa

04-26-2014, 04:38 PM

Hey Will
The output transformer you are looking for will have a 7-8k with a ct. That's 3.5 to 4k per tube. Wattage 250v x 70ma= 17.5 watts. 20w unit is fine. I've been told that the voice coil is very low impedance like 1.5 ohms. Most universal jobs will start at 4 ohms.
GL on getting the Might 87 singing again!!
Terry

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87 - by skyscraper - 03-30-2014, 06:15 PM

RE: 87 - by TA Forbes - 03-30-2014, 11:39 PM

RE: 87 - by skyscraper - 03-31-2014, 01:44 PM

RE: 87 - by morzh - 04-17-2014, 08:14 PM

RE: 87 - by skyscraper - 04-17-2014, 10:42 PM

RE: 87 - by morzh - 04-18-2014, 11:14 AM

RE: 87 - by Radioroslyn - 04-26-2014, 04:38 PM

RE: 87 - by TA Forbes - 04-27-2014, 09:03 AM

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