Tung Sol KT 170

FYI $106 each online. 

earlflynn

How did the KT170 tubes work out in your Qualiton X200?

Interested to hear your impressions!

Just ordered 4 for my Qualiton X200 that will work with out modification.

My little Dennis Had Firebottle amp can use pretty most any power tube (except 300bs and a few others), although I'd possibly send him an email before trying 170s. He did tell me once (email) that 150s worked great in my amp, and they did.

I looked again at the spec sheet that was linked. What's up with all of the redacting??

Wow!  This is new to me.  FWIW I traded my cj ARTsa, which used (8) KT 120 for a new cj ART150 which uses (4) KT 150 and the new one offers a worthwhile improvement in every respect.  It is more stable, too.  In fact in over a year of daily use I have only had to re-adjust the bias on one tube and it by only a small amount.  It does put out a lot of heat and for that reason I put cooling fans on it.  In any event, based on this experience I would guess that the KT 170 has the potential to offer additional performance benefits for amps designed to use them.

Dear lord its like the receiver wars of the 70s more and more power.

A little more info.
https://primalunablog.com/2020/10/30/tung-sol-kt170/

"The Tung-Sol KT170 has a power dissipation of 85 watts allowing amplifiers using a pair of these tubes to reach power output levels in excess of 300 watts."  That's a lot of juice and heat! 

I would imagine an amplifiers transformer requirements no less than what is needed to handle the KT150?  

Here's hoping a few things will apply..1) They do not need a revised transformer design, as the KT150's required 2) they are reliable and consistent and 3) they don't give off too much heat!

They're ugly!