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ST-70 Custom Died - Where To Start?

gadget73 said:
Still say it looks like a cat.

yellow-cat-van.jpg
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That's the cat bus from a great Japanese cartoon called Totoro. If you have young kids they will enjoy it. It's a heartwarming and endearing story and would be just right for sit down to watch with young grandchildren at Christmas time
 
Olysio and Sovaldi in combination is what cured and saved me. Had the treatment a week after the release for use. I feel very lucky to have survived genome 1 the worst kind. Thanks be for good insurance. I paid 450 out of a bill that was 150,000 for the 2 months treatment. Previously went through interferon and ribavirin regimen but got so sick I thought that would kill me then a clinical with same result. All is good now. If your a baby boomer get tested. I never got sick or showed symptoms and only found out through a blood test. Good luck with your recovery.
musichal said:
Thanks. Yes, cure, but doesn't undo damage done - will prevent further though, if I'm in the lucky 95%. [First med, same cost, a few months ago, I missed the lucky 90%. Hep C, apparently from one of several surgeries back in the dark ages. One very lucky thing - my copay is zero.]

And good news!! Fuse replaced, amp singing like new, no noise or hum and as quiet as ever. Hooray!

Yeah, now it looks obvious where the fuse goes... doh!! Pulled a Homer. Thanks for helping the simple-minded, guys.
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Yeah, I took the Sovaldi 3-month regimen already; didn't work for me. Now taking an even newer one recently approved - Epclusa, also 3-month. (Really 24 weeks both.) With ribavirin.
 
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I'm pulling for ya. Hopefully a Christmas present of hep c free life. All the best. Mark
 
And that relates to my tube amp problem by making me so tired (and anemic) that I haven't felt like gathering up the stuff I need to replace and bias a new set of tubes, though I make progress incrementally - some is gathered. I've been working on a diy indoor FM antenna for a good while now, and hope to do a thread on it in a couple months or so. If it works well.
 
I can relate to a lesser extent with your health issues. I went through a spell back in 2011-12 with adult, normal pressure hydrocephalus( excess fluid in the brain) requiring 2 brain surgeries. Thanks to a great neurosurgeon and the Good Lord I'm pretty much back to normal, although I'm going back in for laminectomies on 2 lumbar vertebrae next week . Spinal stenosis has made it really hard to walk for the last 6 months. Getting old ain't for sissies !!! You'll be in our prayers. Fortunately I am blessed with a wonderful wife !! JOHN
 
Well, I just replaced the fuse again and found a new set of JJ's EL34s that I had forgotten I'd bought. When Christine gets home, she'll plug it back into the system and help me with biasing tubes (if they light up). I'm going with the theory that nothing else is wrong other than worn-out tubes, and taking the easy way here. If that doesn't pan out, then hopefully I won't fry any Khorn drivers or set the house on fire, and it will be back to the table for further investigation. If I ruin one of the tubes in this matched quad, then at least they are the cheapest I have on hand, and if there are no problems I'll run 'em 'til I flash one. Rolling dice with tubes.
 
...And the follow-up. Fuse blew immediately. No tube glow. For me, that means I'm looking at an extended down-time, likely very extended. Such is life.

Back to SS.
 
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musichal said:
...And the follow-up. Fuse blew immediately. No tube glow. For me, that means I'm looking at an extended down-time, likely very extended. Such is life.

Back to SS.
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:(

Let me know if I can help at all Hal! I'm sorry to hear you are still having problems!
 
I'm bummed for you Hal.
Are there any AKers nearby? I'm sure someone would be happy to help. While the amp is apparently sick. I think it can be easily cured.
 
Have you tried starting up the amp, with NO output tube installed?

Finding out If the fuse does or doesn't blow then, is helpful diagnostic information.

I'd guess there may be a bad coupling cap or a bias problem- given the failure mode of the previous tube (redplating), and that it blew the fuse with new tubes. If this is the case, it should not blow the fuse with no output tubes installed.

If it DOES blow the fuse without output tubes, it's almost got to be a power supply problem...

Regards,
Gordon.
 
Yep starting to sound like a tech should become involved. I am sorry to hear it wasn't an easy fix after all.
 
GordonW said:
Have you tried starting up the amp, with NO output tube installed?

Finding out If the fuse does or doesn't blow then, is helpful diagnostic information.

I'd guess there may be a bad coupling cap or a bias problem- given the failure mode of the previous tube (redplating), and that it blew the fuse with new tubes. If this is the case, it should not blow the fuse with no output tubes installed.

If it DOES blow the fuse without output tubes, it's almost got to be a power supply problem...

Regards,
Gordon.
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I'll try that and post the result, but I think I'm gonna need to ship it to someone for a fix. Someone posted a great link to a trouble-shoot site explaining step-by-step things to measure, which was pretty much Greek to me.
 
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