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squeal huh ? I still say the TRB-1 is the best board I've ever used over the years (in any radio) Your radio should not squeal period at any volume unless you have a talk back resistor that is to low in resistance ? (or a bad ground)

I have always put "all grounds" to the mic pin grounds as suggested with the TRB-1. It doesn't mean a can or chassis ground wouldn't work , the directions call for (mic pin ground.)

Stray RF from these boards can cause squeal as well , I always cover the board in a big hung of heat shrink tubing or cover nicely in electrical tape completely. (weather mounted inside , or nicely shoved under the front end wires and secured)

Even for just a touch of echo/reverb , I still find the TRB-1s to be the best. They can be slightly touchy , but still the best. Good luck to you LC.

<blockquote data-quote="Switch Kit" data-source="post: 148449" data-attributes="member: 72">squeal huh ? I still say the TRB-1 is the best board I&#039;ve ever used over the years (in any radio) Your radio should not squeal period at any volume unless you have a talk back resistor that is to low in resistance ? (or a bad ground)&nbsp;I have always put &quot;all grounds&quot; to the mic pin grounds as suggested with the TRB-1. It doesn&#039;t mean a can or chassis ground wouldn&#039;t work , the directions call for (mic pin ground.)&nbsp; &nbsp;Stray RF from these boards can cause squeal as well , I always cover the board in a big hung of heat shrink tubing or cover nicely in electrical tape completely. (weather mounted inside , or nicely shoved under the front end wires and secured) &nbsp;Even for just a touch of echo/reverb , I still find the TRB-1s to be the best. They can be slightly touchy , but still the best. Good luck to you LC.</blockquote>

[QUOTE="Switch Kit, post: 148449, member: 72"] squeal huh ? I still say the TRB-1 is the best board I've ever used over the years (in any radio) Your radio should not squeal period at any volume unless you have a talk back resistor that is to low in resistance ? (or a bad ground) I have always put "all grounds" to the mic pin grounds as suggested with the TRB-1. It doesn't mean a can or chassis ground wouldn't work , the directions call for (mic pin ground.) Stray RF from these boards can cause squeal as well , I always cover the board in a big hung of heat shrink tubing or cover nicely in electrical tape completely. (weather mounted inside , or nicely shoved under the front end wires and secured) Even for just a touch of echo/reverb , I still find the TRB-1s to be the best. They can be slightly touchy , but still the best. Good luck to you LC. [/QUOTE]

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