I received 71 Voshkods burnt em for about 25hours, and up to now they re no better than stock.
Tried some Reflektors 74 which already have 75hours, and wow !
Do you think the Voshkods will eventually open up or did I get a pair of doozers?
Our Russian tube Guru rb2013 would tell you that the Russian tubes can require as many as 200hrs of burn in. I have multiple sets of Reflektor and Vokshod's and have found the SQ will change during the burn in period.
The 74 Refecktor silver shield SWGP are my 2nd favorite of the Russian tubes. The only ones I like better are the 75 HG's.
Your are holding the 71's to a pretty high standard compared to the 74's
Of course IMHO and YMMV...
My first set of Russian's were 77 Vokshod gray shield. After burn in they sounded a lot better than the stock tubes. So give them some time before you write them off.
Hey guys. Decided to part with my 1966 Siemens CCa "Grey Shield" I got from Brent Jessee, and also my 1969 Mullards from the Blackburn factory. Two totally different tubes, yet fantastic in their own right. Let me know if you're interested.
I PM'd ya a couple of hours ago too.
First = 3rd Week of January 1972
Second = 5th Week of September 1969
Philips SQ as in E88CCs? Could be worth it, depending on the price.
No your not crazy...
I feel the same way. My system sounds better after a warm-up period.
No science just IMHO...