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1200 ohm to 3.5 ohm.rola speaker trans
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Return to top of page · Post #: 1 · Written at 3:15:54 PM on 17 March 2023.
	Tallar Carl Location: Latham, ACT Member since 21 February 2015 Member #: 1705 Postcount: 2157
I have come across quite a few NOS speaker transformers and want to know if these can be run from a 6v6 with no issues.

Return to top of page · Post #: 2 · Written at 4:16:29 PM on 17 March 2023.
	Robbbert Location: Hill Top, NSW Member since 18 September 2015 Member #: 1801 Postcount: 2017
Hmmm... 1200 ohm is rather low for a 6V6, I think it needs at least 5000 ohm. I would expect it to overheat with only 1200 ohm.

Return to top of page · Post #: 3 · Written at 7:09:25 PM on 17 March 2023.
	DangerousDave Location: Toongabbie, VIC Member since 1 September 2020 Member #: 2438 Postcount: 130
Output Coupling transformer for common emitter amp?

Return to top of page · Post #: 4 · Written at 7:41:58 PM on 17 March 2023.
	Fred Lever Location: Toongabbie, NSW Member since 19 November 2015 Member #: 1828 Postcount: 1251
Guys, the load reflected back to the plate is a function of the turns ratio. ALL OTHER THINGS BEING EQUAL We have 1200 to 3.5 if you put say a 8 ohm load you get about 8/3.5 x 1200 = 2400. load with 16 ohm and you have some 4800 ohm. So the trannies may be ok on a pentode or better still a triode. Why did I shout above? Cause I don't know, the wire size, the iron size so have no idea if they are good for 500milliwatt or 500 watt. Don't know voltage rating either. With a 8 ohm speaker and if they are quite oversize, may be fine for a 6V6 on 220 volt ht. Would be settled with an actual test. Could be better than nothing. Fred.

Return to top of page · Post #: 5 · Written at 10:27:45 PM on 17 March 2023.
	Tallar Carl Location: Latham, ACT Member since 21 February 2015 Member #: 1705 Postcount: 2157
Thankyou Fred that makes sense

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