6H30 replacement

@astolfor

sounds like you are on the right track and you will find the answers you seek

my thought on talking to andy baumann was not to have you source ruskie 6h30’s from him, but to seek his thoughts on suitable old stock usa and euro alternatives, which i think is what you are ultimately seeking, yes? 

for example would a 7dj8/pcc88 work in your case? in modern c-j linestages that run the 6dj8’s at 6.3v and at full gain, many classic 6dj8’s lose it too soon, and as a result, it has been discovered by we c-j users that the 7dj8 is a stronger version of the same tube, can stand greater plate voltage for a much longer period and maintain top performance, and so it has become the new standard in those units

as you can imagine, anyone who has that kind of knowledge on vintage tubes is not young, and so how folks like andy they respond and how helpful they are willing to be with advice and knowledge is affected by how they are approached and asked... :)  (btw - don't get him started on old stock g-e's... hahaha)

Please keep us informed on your journey and what you end up with, astolfor.  We can all learn from your experience.

I am far from a tube expert. But I have a CJ preamp which uses the 6H30P. I have been told that there are no replacements for that tube. So, indeed, if one is available, I'd love to know about it. I've also read that the DR's offer a subtle change but nothing drastic.I'd hate to pay $400 or more to find out I got $2 worth of improvement.

I think the difference depends on the vintage of the DR tube as well as the circuit in which it is used. My line stage, a Veloce, uses the 6h30. When I bought it new, I got NOS DR Reflectors and ran them for over 5 years-- I heard a noise in one channel and eventually traced it down-- it was not one of those tubes (thankfully, I kept them). Using the Electro-Harmonix version as a stop gap, the system sounded lifeless, sterile, no ambience or air.  I was told the Sovtek is more punchy sounding but still the same "quality" as the E-H compared to the DR. Found a replacement quad of the DRs- from '77 if memory serves. Never used. Back in business. 

I've seen comments by others using ARC equipment that using the recherché DR variant made little difference. 

Not an easy tube to find, particularly from most tube dealers we rely on; Andy did not want to even talk about that tube when I last spoke to him about it. 

It is a big negative in my estimation that the rolling options for this tube type seem to be so limited. I am no tube guru, so have no idea of a direct equivalent. Interested to learn what you find. 

Good hunting. 

If you must go western, the 5687 is far closer to the 6H30 than the 6DJ8 family of tubes and would be my personal preference. J8‘s will burn up in no time at anything like the bias h30‘s generally run at. Again I have used these in my builds, and in the right application they are a fine tube.

From the jacmusic site:

It is found in many amplifiers, such as: Audio Note M3, Manley Jumbo Shrimp,Ayon CD player, Audio Note DAC 5 Signature and Audio Note amp kits, M5 preamp, M9, KR Enterprise 32BSI integrated SET amp, Modwright 9.0 and Modwright Sony and Denon modded CD players, Modwright Sony NS999ES CD player, Opera Audio Consonance Cyber 800, Zanden, Manley amps, LUX 300B amp,Kondo M1000, Artemis Labs linestage, Emotive Audio Sira, Ray Samuels B52 and Raptor, Audio Tekne TFM-9412, Sonic Frontiers Power 2 Amps, Audio Experience BALANCED A2 preamp (YS-AUDIO, HONG KONG), Ongaku, Audio Note, New Audio Frontiers Legend II preamp, Loth X JI300,Audio Thrills, Mastersound, Sophia Electric KT88 Tube Amplifier, Icon Audio PS3 phono power supply, Almarro.