Modded P45

[Perry Babin]

The following page is being used to fill a page that was no longer being used on my site. Some of you may find it amusing.

Modified Punch 45

[I Am An Idiot]

Hopping up a Punch 45 sounds about as good as turbo charging a Chevette. Your friends sound like a bunch of Oh nevermind.

I think they should try some IRF(P)3415s in the next one.

[Perry Babin]

You should know.

[I Am An Idiot]

Couldn't you easily do the same thing on the Punch, 40 (version 2 of course) 60, 100 and the punch 200. It would take 3415s and 6215s as outputs. Do you think that there would be any problems with the driver boards, beside the resistor in the corner of the outer boards? Would the supply drive circuit be able to drive the 3205s?

[Perry Babin]

There are lots of choices for the N-channel outputs. The IRF3710Z would be one possible choice. There are fewer choices for the P-channel. The IRF5210 should take more abuse than the 6215 or the 9540. I'm sure someone could come up with more rugged transistors. Those are some I've used in the past. I've never tried using them in the amps you listed.

[1moreamp]

Nice work Perry
I did a 150 from that era myself and mono at 2 ohm it would pull a solid 50 amps@14.4V off a HP Harrison power supply I had on my bench back then.

It ran hot like Hades but it played flawlessly, and still operates today. A real testament to the good old days of "Old School" car audio....thx for the reminisce...

[damage]

Originally Posted by 1moreamp

Nice work Perry
I did a 150 from that era myself and mono at 2 ohm it would pull a solid 50 amps@14.4V off a HP Harrison power supply I had on my bench back then.

It ran hot like Hades but it played flawlessly, and still operates today. A real testament to the good old days of "Old School" car audio....thx for the reminisce...

I got 346@2.76 ohms bridged off one of my Punch 150s. I ran out of bench supply and was stuck at ~12.6V. It does run hotter than hell. This amp is unmolested. Just new caps.

[1moreamp]

Originally Posted by damage

I got 346@2.76 ohms bridged off one of my Punch 150s. I ran out of bench supply and was stuck at ~12.6V. It does run hotter than hell. This amp is unmolested. Just new caps.

Oh mine was very much molested...As I recall it was a idea I was carrying back then that RF was watering down the production amps they were selling to make them as cheap as possible.
So I ventured to throw the works into a pre-HD 150. It was simply amazing what that little amp would do with the more expensive components put back into the design. Yes Sir simply amazing, if I could have modded it for water cooling like PPI did it would have been outstanding...sigh...

[damage]

This one has 6487/6490 combo in the outputs. What would be a good upgrade?

[Perry Babin]

There's not much available as an upgrade in bipolar transistors. If you can get enough bias voltage (or if the circuit is fast enough), you may be able to get FETs to work. You'd have to be careful because the bias may not hold at high temperatures and the circuit may not be stable (it may oscillate).