OK guys thanks for the input. It seems that circa 05 and 06 Sovtek 5AR4's have very short life spans. It is sad as I have used Sovtek 5AR4's for nearly 17 years without a problem and would routinely get 6 or 7 if not more years of use out of them. I spoke to Otto at Sovtek/New Sensor and reports no increase in failures of that tube he wasn't convincing to me as I see many failures.
I have switched to JJ 5AR4's since the begining of the year and ( fingers crossed ) haven't had any rectifier failures to date with them.
It's funny to because most reprorted failures are on MAZ JR's, which has a low input capacitance 40 uF well under max rateing, and total currant draw of the Jr is under 100 mA and true 5AR4's are rated at 250mA max.
Good luck with the tube search Doc. I really appreciate the fact that you have taken time to consult with your customers on this issue in order to deliver the best amp you possibly can. How many other amp companies would do that. Luckily, I haven't experienced one of these problems, but it is very comforting to know that the man behind the amps is digging into this type of issue. Thanks Doc!
Post by Stylemaster on Sept 11, 2007 13:15:53 GMT -7
1 ) Have you blown a HT fuse ? I blew both fuses. 2 ) Was the rectifier the the cause ? Yes. Watched it spark before new fuses blew. 3 ) What model Z was it ? Maz Sr. Reverb Head 4 ) Circa of amp or serial number ? Q - 2006 model 5 ) Type of rectifier and date code at bottom of tube ? Sovtek
Replaced the rectifier with an OS (Old Stock) GE GZ34 - the original from my '64 Tremolux which my amp tech said was still good. Maz sounds like new amp now. And, most importantly, it works!
GuitarZ: Thank You Z-Talk! I blew the dust off of my Signa Drive to plug in and was scratching my head on my old settings. I finally thought to do a search here and found a Z-Talk thread from 2011 with my settings. Nice!
Jun 13, 2021 15:06:40 GMT -7
The Bad Poodle Experience: only side effect from Pfizer shot #2 is the voice of Bill Gates in my head, giving me bad fashion advice. weird!
May 12, 2021 11:26:35 GMT -7
BradPaisleyFan (Pat): markT In hundreds of years from now, that little button will be a piece of history like weapons found in past wars are sought after nowadays.
May 10, 2021 18:51:22 GMT -7
GuitarZ: Great Business Name: wickedcas.com Noticed it while looking at Google Maps. Was scratching my head as to the product. Saw it was custom car stuff & they're in New England. Light Bulb went on: Wicked Cas! Clever.
Apr 26, 2021 8:40:39 GMT -7
BritInvasion: Guitar picks.... they don't make celluloid like they used to.
Apr 26, 2021 4:20:22 GMT -7
markT: Second Pfizer shot had me very tired the day after. A little headache.....but was back to normal the next day. I got a button that says," I got THE shot"...lol
Apr 21, 2021 4:21:16 GMT -7
GuitarZ: The Mrs jumped into action to find me a cancellation & called multiple spots. One said they had one now if the person didn't show up. She said GO! Went & got the shot. Called the Mrs. She says Where are you At? Went to the wrong one. Guess I don't listen.
Apr 15, 2021 12:55:54 GMT -7
Ed M.: got my second Pfizer shot yesterday and paying for it today, bad heache, fever, chills, aches. I'm hoping this is a one day thing
Apr 14, 2021 11:40:20 GMT -7
j4gitr: Second Pfizer shot gave me a sore arm I felt sluggish, but played a couple hours of guitar with a friend, and ran an errand. Afternoon nap just about set me right.
Apr 13, 2021 15:11:32 GMT -7
Maddog: Moderna 2nd round booster kicked my butt for a coupla days: chills, fatigue, FLS (felt like s___). I could still work, but just felt crappy... WORTH IT tho!
Apr 13, 2021 9:35:00 GMT -7
bubs42: Spoke too soon, that second Covid shot shut me down for a full day. Fever, chills, aches, pains, but i'm still here.
Apr 10, 2021 7:22:14 GMT -7
bubs42: Thanks to my work in manufacturing I have been fully vaccinated. Shot 1 went smooth only a sore arm, shot two was the same. I'm almost 25hr post so far so good.
Apr 9, 2021 8:16:56 GMT -7
The Bad Poodle Experience: Got my pfirst dose of Pfizer vaccine and so pfar, I'm pfeeling pfine. No side epfpfects I'm aware of.
Apr 8, 2021 13:54:54 GMT -7
KeithA: Poodle, what will you do with your spare time !
Feb 27, 2021 4:16:29 GMT -7
The Bad Poodle Experience: eight months on and the remodel/addition is almost complete. no more calling the contractor and telling him my wife has change her mind about what i wanted.
Feb 26, 2021 15:22:52 GMT -7