Comments on: ‘The guy told me that it has a bad power transformer, and he’s some kind of genius’ https://www.preservationsound.com/the-guy-told-me-that-it-has-a-bad-power-transformer-and-hes-some-kind-of-genius/ information and ideas about audio history Wed, 28 Feb 2018 07:45:47 +0000 hourly 1 https://wordpress.org/?v=6.9.4 By: Cyril https://www.preservationsound.com/the-guy-told-me-that-it-has-a-bad-power-transformer-and-hes-some-kind-of-genius/#comment-453970 Wed, 28 Feb 2018 07:45:47 +0000 http://www.preservationsound.com/?p=5490#comment-453970 Fantastic blog!

]]> By: Evan https://www.preservationsound.com/the-guy-told-me-that-it-has-a-bad-power-transformer-and-hes-some-kind-of-genius/#comment-362204 Sat, 16 Jul 2016 06:40:12 +0000 http://www.preservationsound.com/?p=5490#comment-362204 Good shit. Nice to see a fixer-upper project come together.
And I appreciated the nice clear instructions (for those of us with only quite basic comprehension of circuits, like myself!)
Nice! THANKS.

]]> By: DCBC https://www.preservationsound.com/the-guy-told-me-that-it-has-a-bad-power-transformer-and-hes-some-kind-of-genius/#comment-347640 Wed, 27 Jan 2016 21:34:12 +0000 http://www.preservationsound.com/?p=5490#comment-347640 You don’t need a half power switch .Just pull the outer or inner tubes and run it at 50 watts and 8 ohms .

]]> By: chris https://www.preservationsound.com/the-guy-told-me-that-it-has-a-bad-power-transformer-and-hes-some-kind-of-genius/#comment-32998 Thu, 25 Oct 2012 12:52:30 +0000 http://www.preservationsound.com/?p=5490#comment-32998 In reply to Pasquale.

well good luck. half power switch is a good idea, and remember that this will change the expected speaker load to 8 ohms (rather than 4). I just got a new quad of 6L6s for mine, v v v curious to see how much this improves the sound. 6L6s have gotten expenseive! Rubys were the cheapest i could find, $60 for a quad. Just two years ago i was getting russian 5881s for $9/each….

]]> By: Pasquale https://www.preservationsound.com/the-guy-told-me-that-it-has-a-bad-power-transformer-and-hes-some-kind-of-genius/#comment-32900 Thu, 25 Oct 2012 02:46:55 +0000 http://www.preservationsound.com/?p=5490#comment-32900 Got one of these coming in this weekend and we have been debating dropping in a half power switch, just lift the cathodes of a pair of the output tubes, to get more use out of the thing, seems like a good mod, but I haven’t seen the amp yet.

]]> By: Bafflegab https://www.preservationsound.com/the-guy-told-me-that-it-has-a-bad-power-transformer-and-hes-some-kind-of-genius/#comment-30167 Wed, 26 Sep 2012 02:42:54 +0000 http://www.preservationsound.com/?p=5490#comment-30167 What kind of amp is it? DO YOU HAVE A SCHEMATIC??????? Until you really know what you are doing it is a no go item. No have schematic, no go further.

]]> By: chris https://www.preservationsound.com/the-guy-told-me-that-it-has-a-bad-power-transformer-and-hes-some-kind-of-genius/#comment-30152 Tue, 25 Sep 2012 20:05:21 +0000 http://www.preservationsound.com/?p=5490#comment-30152 Hi Alex. i have never seen an amp with two hum balance controls, but then again there is a lot in this world I have not seen. I really can’t answer your question based on the little information that you have provided… but if it’s rusty it should certainly be replaced.

]]> By: alex https://www.preservationsound.com/the-guy-told-me-that-it-has-a-bad-power-transformer-and-hes-some-kind-of-genius/#comment-30120 Tue, 25 Sep 2012 14:42:53 +0000 http://www.preservationsound.com/?p=5490#comment-30120 Would some amps, have two hum balance control pot?

I have an amp I’m fixing. And it has two 100 ohm pots that are seriously rusted.
The amp itself is having trouble. Could those pots be the problem?

]]> By: Bafflegab https://www.preservationsound.com/the-guy-told-me-that-it-has-a-bad-power-transformer-and-hes-some-kind-of-genius/#comment-30078 Tue, 25 Sep 2012 04:25:08 +0000 http://www.preservationsound.com/?p=5490#comment-30078 The best guitar amp tech I knew had a bench supply with adjustable B+, bias, and a fused metered heater supply. Tough dogs he fixed by opening the transformer circuits, soldering on wires to the supply, and powering up. Shorts showed up instantly. He said that’s how his dad fixed old radios in the 40s, fast and profitably.

Also kept him from putting time and parts in a set not worth fixing because new iron wasn’t worth it.

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