I have here a 1999 Pitbull 45 I have kept functional for its owner for about 10 years..
Its got a new problem of intermittent dropouts..
We are in UK.. for goodness sakes put these schematics online.. we are not going to ship amps over the altantic.
Its going to take forever to trace and test..
Maybe he should buy elsewhere?
There is no commercial advantage in protecting these schematics..in fact in the UK its really damaging resale values..
Hi Chrisa,
Welcome to the forum!
Nice job on keeping it running.
Our policy is to work with reputable repair shops. If you fall into this category of course we would be happy to assist the repair with technical information and assistance. It’s in everyone’s interest to avoid unnecessary shipping charges, not sure how you jumped to that conclusion.
Hi
Not a commercial repair shop unfortunately. Just a 20 yrs retired Biophysics scientist keeping local musicians amps etc working.
I do about 50 or 60 fixes a year from vintage to more recent.
Hard working amps like Fender and Marshall to exotica like Watkins, Carr, Toneking and Blankenship.
.
In particular this amp is a Pitbull 45 C-5084T serial GE990261. Ef86 in reverb driver.
If you can provide a schematic that would be great and helpful in tracing the signal path.
My comment about shipping was because when I fist saw this amp over 8 years ago I asked for the schematic and the reply was that these were not issued and to ship it to you for authorised repair.
Hi Chrisa,
Will PM you…
Unfortunately, the official schematic for that amp was lost in a server crash a few years ago. The print version is illegible due to constant overwrites.
The good news is that we can usually direct you to most issues without the aid of a schematic. We can help you track that down here, or you can contact support@fryette.com for that.
For the moment, an intermittent dropout is almost always caused by contact oxidation of the FX Loop return jack. The loop is always in circuit, so it’s easy to test this yourself. Just put a jumper cable in the loop and see if the dropout is resolved.
The other most likely culprit is the footswitch jack connector and plug. Cleaning and tightening the contacts usually takes care of that. Also make sure the set screw on the footswitch cable end connector is tight.
Cheers,
Dave
Resolved this in private message along lines of what Dave said above. Reopened incase Chris wants to come back and write anything.
Thanks Guys..
The backup from you has been great.
I took the board out and reflowed and cleaned everything so probably solved the issue.
Shame the schematic has been lost..
Maybe when I have the time…?