trinityamps.com

Greetings!

Just finished my Lightning. Just wondering if there is a voltage chart out there somewhere. Also, getting some horrible squeals. probably oscillation...any ideas?

Thanks!!

Check out the posting for voltages :

viewtopic.php?t=151

You might have a microphonic tube. Swap them around. Also try reversing the transformer leads if all else fails.

Did you follow the Trinity layout? or did you do your own?

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

I followed a Trinity Layout that I got about a year ago. Is everything accurate?...or is there an updated layout?

Thanks again,
Kelly

Should be OK, but check back to our links section. I just updated it. there have not been any significant changes to the layout for a while. Certainly no changes that would cause a squeal.

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

From GEOFEX.com

Some causes of squeal:
* Tube going microphonic - most often first preamp tubes.
* Shorting contact on input jack (esp #1) not making contact; the "squeal" is from sound vibrations vibrating the chassis and the contact making and breaking contact repeatedly, making a little 'click' each time.
* Power tube shorted (this only happens for a short time - the amp squeals and then dies.)
* Lead dress - the leads carrying the signal around inside the amp have been moved around somehow so that the signal is causing internal electrical feedback. You can find this by running the amp with the chassis open and moving the wires around (gently! with a wooden stick) to see if the squeal changes or goes away. Once you locate the critical wire(s) you can figure out where they have to be to keep this from happening and tie them there. Another option can be to substituted shielded wire for the sensitive ones, with the shield connected at one end of the run only.
* If the amp has been modified, the squeal may be caused by poor lead dress in the modification, improper grounding in the modification, parts layout too close, or just that the new (usually higher) gain has pushed things over the edge. Higher gain makes a lot of things more critical, including grounding, bypassing, lead dress, and signal shielding.
* Wrong polarity/ incorrect hookup of a replacement output transformer.

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

try swapping the output transformer leads to the power tubes.

I've made some changes...sheilded input wires, moving some things around...Much, much better. I'll report back on all my findings. Thanks for all the tips!

kel