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Blackstar guitar amp model Ht-5H    
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TvPete



Joined: 31 Mar 2016
Posts: 1
Location: St. Petersbug Fl

PostPosted: Thu Mar 31, 2016 12:35 pm    Post subject: Blackstar guitar amp model Ht-5H Reply with quote

Problem: No audio Output
All B+ voltages are present. Hybrid chassis with tube output and drive. Output tube seems saturated: overheating. - and+15v on op amps. Output and 24v transformers conducting. Owner said he tried tubes. Do not have print or tubes. Has anyone come across these symptoms? Should I try both new tubes at once?
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JTS1957



Joined: 21 Jan 2009
Posts: 2340
Location: Far, Far Away

PostPosted: Thu Mar 31, 2016 2:39 pm    Post subject: Reply with quote

http://elektrotanya.com/?q=showresult&what=blackstar%20Ht-5H&kategoria=&kat2=schematics

Bad electrolytic(s) and/or a resistor may have changed in value.
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