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Classic gear from yesteryear; vintage audio standing the test of time.

How high is "up"?

Your question, unfortunately, is too vague.

Are you planning on keeping the circuit completely stock, using the 7199s, etc?

It would be easy for someone to say "$300", but lets say you felt that V-Cap Teflon capacitors would give you the "top performance" you seek from these units. If that's the case, you could easily spend more than $300 on coupling caps alone.

Your picture shows the squatty original power transformer, which many claim is under-powered, even for the stock circuit. There's another (approximately ) $130, just for a power transformer.

You'll get clearer answers once you decide what you want to do with your Dyna find.

Oh, and please don't succumb to temptation and just plug them in, if you have no way to variac or other "soft-start" method. What might be perfectly good could be ruined by such haste.

Those ST-70 tubes alone are worth quite a bit. Don't tempt fate! Nice find, by the way.


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