Recent content by sjors

If no one has a circuit schematic of the Ampeg PF-800 , ......and the factory/company of that brand does't make it available ,....and the warranty is only for two years ,.....and considdering the high number of failures and complaints when the warranty period just has expired ,...can someone...

Is here anyone who has a circuit schematic of the Ampeg PF-800 ?????? Ampeg is part of Yamaha nowadays , ...so I did a request to the Technical Support Department of that company for sending me a circuit schematic by email , ....but till now I did not receive anything from them ! :rollno:

What I can think of ( in this example ) , is that there are mainly two technical/electronical restrictive causes . Whatever the brand , these manufacturers have to make money , so in the production lines they use the not too expensive , generally available electronical parts for the amplifiers...

F.i. : "Wave" , "L-O-V-E" , "All Of ME" , "Spooky" , "Fly Me To The Moon" ? These songs are not that difficult to play

I don't know what happened that the pictures are double posted ??? ,....but here a new attempt....

I've recently restored an old ( and rare ) , 1969 dated , Pre-HIWATT , Sound City 200 Mark 3 Custom Built . ( Sound City , Dallas Arbiter LTD ) In fact it's an L200W ( lead ) , but I did the ( very easy ! ) factory-modification to convert it into a B200W ( bass ) Originally , it's an amp with a...

An oldie , but goodie ;)..... I did a few modifications in the preamp circuit to achieve a way better low end , and on acount of that it's the best bass amplifier I've ever had. I've got two of them , completely reconditioned ! I've mounted these amplifiers in a 19" casing , ....because...

Just for a quick test : Take a small 9V battery , and press the jack of the speaker cable ( tip and shaft ) against both poles. See if both speaker cones are moving inwards/outwards. ( so if that happens , your speakers are probably oke )

At this moment , I'm busy with repairing an Ampeg "SVT-3 Pro". The problem with this type of amp , is that it is almost impossible for the average bass player to service this yourself . because you need a scope , tone-generator , dummy-load and multimeter ( even if you want to replace the...

maybe it's cheap for now , but as soon as you get trouble with it , you will find out that it is hard to get spare parts