Jolida jd-502p


Anyone using 5751 tube to replace 12ax7's in a Jolida. I have read that it may not work well with some circuit designs. Also curious about what other Jolida users are using?
128x128wilson667
Please don't lure me into the lurid world of Old Tubes. It just seems like an network of crazed and sweaty audio geeks yanking dusty old tubes from abandoned 1950s radios to put on questionable testers while trying not to knock the painted logos off. Give me a New Sensor shiny glass product instead!
Although Philips "Mini Watts" are on my short list of things to try someday...is that so wrong?
Wolf, I agree on trying small signal 8-pin and rectifier tubes of a vintage era. As far as power tubes there are top quality examples being manufactured and they are NEW with guarantees. Now tube rolling in instrument amplifiers...
I've had insane luck with guitar amp tubes...the last time one failed on me was in my Magnatone combo in 1968. This includes constant gigging for YEARS using an old Boogie, a HiWatt, a 1960 blonde Bandmaster, various Twins, Marshalls, etc., etc... I had a 1960 all original brown tolex Deluxe that I used as a studio amp seemingly forever and finally changed some leaky caps and it sounded exactly the same. I mean really...all the effort used by me and everybody else to isolate and pamper our hifi stuff, and I watch an airport lunatic drop a Twin Reverb in an Anvil case 10 feet out of an airplane...that amp worked perfectly for about 6 more years until I sold it.
Very enjoyable read of your equipment experiences. I was always amazed at the rough service and neglect guitar amps would accept. Mine have been in storage for a few years except for my Tweed Champ, so some may just die of a broken heart by being ignored. Of course my trusty vintage Variac is ready for their release. They are finally up for parole soon.