Prolong your tube life with this simple standby switch modification from Fromel Electronics!  This mod works for both the USA made and the newer Pro Jr amps (made in Mexico).  This is an easy mod to install, with a limited amount of soldering and reworking of connections to the circuit board.  This mod replaces the stock two-position on/off switch with a three-position off/standby/on switch.

Instead of settling for the reduced tube life offered by the stock switch, this simple mod will significantly extend the usefulness of your amp's tubes.

Please check out our other Pro Jr listings for mods to improve the tone and reliability of your amplifier.

The instructions included with the kit will only work with US domestic 120v power transformers. The kit will work for international market amps, but you will have to know how to read a schematic and how a standby switch works. We cannot offer support for international buyers.

WARNING: Performing these modifications WILL void the warranty on your amplifier. Working on amps can be deadly if you do not take proper precautions. Follow these instructions very carefully. If you are at all unsure of your ability to perform these modifications STOP and take your amp to a professional to be modified. You can also send your amp to me for modification.

No Warranty: This kit and the instructions included do not include any warranty of any kind. The modifications to your amplifier are at your own risk and you agree to completely hold harmless the seller of this kit against any and all claims. Tube amplifiers contain parts that operate at very high temperatures and deadly voltages. If you are not sure of your abilities to perform these modifications then do not perform them.

 

Available for international shipping, International shipments, especially to EU can take up to 4 weeks because of customs.