Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: isaac_teller on September 09, 2019, 09:04:12 am

Title: 3-way relay with footswitch
Post by: isaac_teller on September 09, 2019, 09:04:12 am

Hello. How would I implement a 3-way footswitch(clean, overdrive and distortion channels) on a TRex type amp? Has anyone ever done this? Shematic? Thank you

Title: Re: 3-way relay with footswitch
Post by: sluckey on September 09, 2019, 09:40:22 am

Quote

TRex type amp?

Got a schematic for that?

Title: Re: 3-way relay with footswitch
Post by: isaac_teller on September 09, 2019, 09:41:35 am

https://mhuss.com/18watt/schematics/18wTRex.pdf (https://mhuss.com/18watt/schematics/18wTRex.pdf)

Title: Re: 3-way relay with footswitch
Post by: sluckey on September 09, 2019, 09:55:24 am

There are only two channels. An A/B switch on the inputs would be easy.

Title: Re: 3-way relay with footswitch
Post by: isaac_teller on September 09, 2019, 11:29:32 am

I want to add a high-gain addition to the clean channel. For example:
(https://robrobinette.com/images/Guitar/5E3P_Build/5e3p_Cascade_Mod_Schematic.png)

Title: Re: 3-way relay with footswitch
Post by: d95err on September 18, 2019, 06:06:44 am

You would need two relays. E.g. one to switch between the two channels and one to switch one channel between crunch/higain.

For this amp, it would probably be easier to add a separate boost stage to one of the channels, rather than folding one channel back into the other.

If you don’t have another triode to spare, you could add an LND150-based stage.

Title: Re: 3-way relay with footswitch
Post by: isaac_teller on September 18, 2019, 02:34:17 pm

Thank you.