Hi

I have a Prince Piggy-2 PS200R amp that has the most pitiful reverb ever. It sounds like someone throwing a metal pipe down the stairwell of a block of flats! I was wondering if replacing the reverb tank with an Accutronics would improve this situation? I realise the tank is not the only factor, but it's the main one.  I will also point out that i would be putting the new tank in the base of the amp cabinet.
As you can see from the picture below, the tank it'self is a ridiculous (one spring) 2" square emarrassment to audio electronics! 

I'm familiar with the concept of matching input and output impedances from other similar discussions on other boards, but how close do they have to be?

The measurement for the input is 208 ohms and the output resistance seems to fluctuate between 214 and 330 ohms depending on whether the amp is switched on or off while measuring. I am measuring where the wires from the PCB are soldered to the lugs on the input and output, as this reverb tank does not have those RCA type connections, it's all soldered.

I have looked on the accutronics website, and while i could get a match for input resistance, the output resistance is quite a difference on any of the models.  Failing that, could the pcb component values be altered to accept the different impedence from the accutronics tank?

Any advice or comments greatly appreciated! More detailed photos on request.

Paolo

Hi, i've just discovered this forum, so hello to everyone.

I hope someone can help me with an issue i have with my Prince (Piggy) PS-200R.  It was made in Japan 25w SS blonde tolex combo with a 10" speaker modelled somewhat on a Mesa Boogie Mk2B. It was made around 1979.

It has a gain control, but all it seems to do is work just the same as the regular volume control.  It was like this when i bought it off ebay a few years ago. If i turn the gain all the way up, and just have the volume on a tiny bit, you can hear an overdrive sound but it is very quiet and in the distance/hollow sounding. If i turn the volume up more than that everything goes clean again.
As i've modded amps and pedals, i 've had a look inside and can't see anyhting loose or burn't out. Because it's a 70's amp the circuit board is a bit different than a modern pcb. It is also pre- op amp chips. If i knew what was wrong i could fix it myself. These amps are very rare now and there is no real info about them on the internet.

I love this amp. It has the best clean sound; It's warm, woody and chimey and sounds like a valve amp. I use pedals for overdrive, but i'd really like to hear what the amp's original gain sounds like!  Any help would be gratefully appreciated.