Super Pride dx300?

[doughboy]

Your best option is probably a second 250 if the plate transformer has enough amperage also there's some other components in there that can hardly support one tube they will need upgrade as well

[Jay Mojave]

Hello All: Yeah that's what I was thinking replacing the 4CX250B with a 8930 tube. But the money for a 8930 Tube just isn't worth the little gain you would get. IMO... You need to at least double the output power to justify the mod in my book, or better yet 4 times the power, which is a 6 dB increase in power, or 4 times the original power, or 1 S-Unit per 6 dB.

So I wanted to add a second 4CX250B Tube to the DX-300 Amp, but the transformer doesn't look like it can handle the added load. Looking over the construction and component layout of the DX-300 or 1000 amps, it appears to me that the amp was designer and constructed for the great looks of the front panel. The chassie layout is quit a hack job from the start, not designed or manufactured for Trouble shooting or maintenance. Let along adding more tubes or any other modifications.

So in the near further I have a old Skipper 300 chassie that I will install two or three 4CX250B tubes, using a separate power supply, trying to keep the Skipper 300 to look as stock as possible. The Tram 201D sounds great now with the stock DX300 amp. And I'll probably keep it stock with its user hostile modification design.


Jay in the Great Mojave Desert