RGR Model 4 Pre Amp ....HUM QUESTION

When RGR Pre- Amp tone button is pressed IN, this Unit is quiet / NO HUM.

However, when tone button is OUT, I get a HUM.

The hum disappears when pressed IN.

Any thoughts about this problem ?

Thanks

rocky131304-27-2022 1:40am

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russ69 Details Discussions Posts This discussion Message User 3,520 posts 04-27-2022 at 04:12pm Copy Comment URL Report Comment Edit Delete After reading your post I tried the RGR 4's tone button. Voila, pushed it in and hum GONE! I nailed it on the first post, lol. On a preamp that old I don't think I would spend any money on a repair unless you were really married to it, not worth it.
rocky1313 OP Details Discussions Posts This discussion Message User 83 posts 04-27-2022 at 07:43pm Copy Comment URL Report Comment Edit Delete
rocky1313 OP Details Discussions Posts This discussion Message User 83 posts 04-27-2022 at 08:36pm Copy Comment URL Report Comment Edit Delete Thank you for your repleys ,

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