ODS with FX loop

[Fischerman]

Maybe I missed it but is there a schematic here for a 50W ODS with FX loop in the amp? I'm going to build a prototype ODS in a Bandmaster Reverb type chassis using some leftover trannies and filters I have...so I'll have 4 preamp tubes. My initial plan is to build a 50W HRM w/Bluesmaster, FX loop and EL34s. I put a Dumbleator in another amp had problems with the Send (I think it just didn't have enough headroom) and modified it to my own Send which worked better ('my' Send is very similar to that in a Mesa Dual Rectifier).

How much does a Dumbleator affect the tone? Do people have luck putting other loops in an ODS? Thanks for any help.

[heisthl]

I did all the work for you http://ampgarage.com/forum/viewtopic.php?t=2832 If you decide to do this PM me and I'll send you the latest schematic and layout.

[Fischerman]

Thanks heisthl...nice looking amp. PM incoming.

Another issue: This PT has a 5vac tap for a tube rectifier...I'm hoping to use this instead of installing the extra tranny for the channel switching. Any caveats? Should I abandon that idea and just use the extra tranny?

[heisthl]

use 5 volt relays and use the taps via a full wave bridge to get >7 volts - this gives you enough to run LEDs in series with the relays. The Zener on the attached schematic is optional.

[Fischerman]

Awesome. Thanks again.