Search found 154 matches

by dak
Sun Sep 25, 2022 6:42 am
Forum: Guitar Amplifiers
Topic: SS Rage 158 Volume Pot
Replies: 11
Views: 132

Re: SS Rage 158 Volume Pot

Does the post lead pot have any effect on the volume? If it is not properly separated via the lead/clean switch, the ability of the 1M pot to do anything would be quite compromised.
by dak
Sun Sep 25, 2022 6:34 am
Forum: Guitar Amplifiers
Topic: Peavey Solo Series Bandit (early 80's)
Replies: 7
Views: 26

Re: Peavey Solo Series Bandit (early 80's)

Something else you can do in the mean time is pull the magnet off of the Scorpion and clean the voice coil groove. There are some videos on you tube. I've had 2 over the years that sounded bad when I got them but was surprised how much better they sounded after cleaning them. Semi-relatedly I clean...
by dak
Sat Sep 24, 2022 5:14 pm
Forum: Guitar Amplifiers
Topic: Peavey Solo Series Bandit (early 80's)
Replies: 7
Views: 26

Re: Peavey Solo Series Bandit (early 80's)

Well, at lower wattage the speaker has a different excursion layout. The Bandit is supposed to emulate a tube amp but at significantly higher power than common tube amps. So a fitting speaker will have a larger linear excursion range than a greenback, meaning that you get an equivalently compact sou...
by dak
Fri Sep 23, 2022 7:13 pm
Forum: Keyboard Amplifiers
Topic: 12V phantom power mod for KB/A 50
Replies: 0
Views: 8

12V phantom power mod for KB/A 50

I am not a fan of batteries, so I prefer powering my electret microphones via phantom power (by now, converters from XLR phantom power to mini-XLR 3-pin are ubiquitous). 12V is enough for the typical adapters available here and is what all the opamps in the KB/A 50 work with, so it's readily availab...
by dak
Fri Sep 23, 2022 4:32 pm
Forum: Guitar Amplifiers
Topic: Peavey Solo Series Bandit (early 80's)
Replies: 7
Views: 26

Re: Peavey Solo Series Bandit (early 80's)

Well, of course the standard question to be asked here is what kind of sound you are aiming for with your speaker replacement.
by dak
Thu Sep 22, 2022 5:03 pm
Forum: Club Peavey
Topic: Customer service question
Replies: 3
Views: 72

Re: Customer service question

So this was the state from 2 weeks ago. Is there an expected age of requests where one has to assume that they have just dropped through the floor and one should retry?
by dak
Thu Sep 22, 2022 4:58 pm
Forum: Guitar Amplifiers
Topic: SS Rage 158 Volume Pot
Replies: 11
Views: 132

Re: SS Rage 158 Volume Pot

Ok, so clearly from the photographs it would be the schematics you posted that are relevant, so that would make it a 1M log pot. Sorry for the confusion. If C13 is shorted (part defect or solder bridge), that would explain your problem. You could try just removing it for a test: I may be mistaken bu...
by dak
Sat Sep 17, 2022 4:18 pm
Forum: Guitar Amplifiers
Topic: Studio Pro 50 Board/Component Layout Diagram?
Replies: 1
Views: 23

Re: Studio Pro 50 Board/Component Layout Diagram?

Given good photographs of front and back of the PCB (by PM I guess), I can try to concoct something like the following: kba50layout.jpg Of course, without labelling, the utility is moderate at best, but at least it makes tracking things somewhat easier. In my case, I am still waiting for the schemat...
by dak
Fri Sep 16, 2022 2:02 pm
Forum: Guitar Amplifiers
Topic: Pacer 100 hum
Replies: 18
Views: 6438

Re: Pacer 100 hum

Signal breakup at very low volume could be the biasing diode for the main output transistors. Transistors don't "turn on" until the input voltage is about 0.7v, and if you have a transistor (or bank of transistors) on the + side and another set on the - side, when the input voltage goes from + to -...
by dak
Fri Sep 16, 2022 1:51 pm
Forum: Guitar Amplifiers
Topic: SS Rage 158 Volume Pot
Replies: 11
Views: 132

Re: SS Rage 158 Volume Pot

Well, this is a different amp altogether. In your schematic, I read clean gain as 1.5M log, distortion pre-gain as 1.5M log and distortion post-gain as 10K linear. Lots of transistors, making it a transtube. My guess is that it isn't the same as an SS Rage 158. A photograph of the controls might giv...
by dak
Thu Sep 15, 2022 6:19 pm
Forum: Guitar Amplifiers
Topic: SS Rage 158 Volume Pot
Replies: 11
Views: 132

Re: SS Rage 158 Volume Pot

My Google foo leads to https://www.audioservicemanuals.com/p/peavey/peavey-rage/1335353-peavey-rage-158-schematic which would put the volume pot at 10kOhms linear, something which I see a lot in solidstate Peavey amps. Also the pot's placement in the feedback path with ground on the wiper is quite t...
by dak
Thu Sep 08, 2022 6:14 am
Forum: Vypyr & Sanpera
Topic: Start problem with Peavey vyper 75 w
Replies: 6
Views: 1996

Re: Start problem with Peavey vyper 75 w

Unfortunately although still analog components, they are implemented with SMDs to save space. Unless you have capabilities to change SMDs, there is likely not a lot that can be done. Possibly something could be done if it is the supply voltages. In my experience, a fine solder tip, desoldering wick...
by dak
Wed Sep 07, 2022 4:57 pm
Forum: Guitar Amplifiers
Topic: problem with reverb STUDIO PRO 110
Replies: 5
Views: 93

Re: problem with reverb STUDIO PRO 110

No, not all the same. The links DAK and JamesPaul sent should help. Pull the tank out of the bag, if it has one. There may be a peavey stock number on it and if your are real lucky, the code numbers/letters that tell what type it is. I haven't seen an Accutronics tank so far that did not have its t...
by dak
Tue Sep 06, 2022 4:48 pm
Forum: Guitar Amplifiers
Topic: problem with reverb STUDIO PRO 110
Replies: 5
Views: 93

Re: problem with reverb STUDIO PRO 110

The vast bulk of reverb problems are loose connections that do not warrant wholesale replacement unless you want to angle for a different kind of reverb (long/short/3-spring/2-spring). In that case, you need to check that you get the right kind of impedance for both send and receive, and also the ri...
by dak
Tue Sep 06, 2022 8:35 am
Forum: Peavey Guitars
Topic: Peavey Rotor Special 3/4 Is It Good Guitar For The Price?
Replies: 3
Views: 121

Re: Peavey Rotor Special 3/4 Is It Good Guitar For The Price?

Most Peavey guitars are surprisingly consistent, and good, due to their manufacturing process. Plenty of CNC machining, of which Peavey was an early adopter. CNC is actually not a warranty for useful instruments though since wood is a living and non-isotropic material (isotropic meaning the same in...