knowledge base for the classic Dynaco ST70
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- filter cap replacement -'forming' the caps?
by guitarpsych » Thu May 03, 2007 10:19 am
- 2 Replies
- 2532 Views
- Last post by guitarpsych
Thu May 03, 2007 12:53 pm
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- reading 0 V on pins 1 and 8
by guitarpsych » Thu Mar 29, 2007 8:38 pm
- 25 Replies
- 10823 Views
- Last post by guitarpsych
Tue May 01, 2007 9:48 am
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- 1 channel went out
by guitarpsych » Mon Mar 26, 2007 7:01 am
- 14 Replies
- 6579 Views
- Last post by guitarpsych
Tue May 01, 2007 9:47 am
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- Russian 7199s
by EWBrown » Fri Jan 19, 2007 12:52 pm
- 5 Replies
- 3654 Views
- Last post by mesherm
Tue Apr 24, 2007 9:17 am
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- 7199 tubes: Any possible substitutions?
by guitarpsych » Sat Apr 21, 2007 7:22 am
- 9 Replies
- 4640 Views
- Last post by Slartibartfast
Tue Apr 24, 2007 5:02 am
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- Just about finished the SDS board, all except for...
by wiredbecker » Sun Apr 22, 2007 9:17 pm
- 4 Replies
- 2936 Views
- Last post by Shannon Parks
Mon Apr 23, 2007 1:49 pm
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- st70 clone with UTC power tranny
by kheper » Thu Apr 12, 2007 7:27 am
- 3 Replies
- 2218 Views
- Last post by TomMcNally
Wed Apr 18, 2007 9:57 am
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- st70 Speaker Recommendations
by wiredbecker » Thu Apr 05, 2007 1:03 pm
- 10 Replies
- 8334 Views
- Last post by wiredbecker
Sat Apr 14, 2007 10:27 pm
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- Bias selenium rectifier replaced with a 1N4004 diode
by Sal Brisindi » Tue Mar 27, 2007 8:40 pm
- 10 Replies
- 10020 Views
- Last post by EWBrown
Mon Apr 02, 2007 5:09 am
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- Easy Bias check without looking at the inside?
by guitarpsych » Mon Mar 26, 2007 12:49 pm
- 3 Replies
- 2064 Views
- Last post by EWBrown
Tue Mar 27, 2007 6:08 am
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- Dynaco ST-70 Filter Capacitor
by Sal Brisindi » Sat Mar 24, 2007 10:07 pm
- 5 Replies
- 3878 Views
- Last post by Sal Brisindi
Mon Mar 26, 2007 1:48 pm
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- ST-70 Gain
by Guest » Mon Mar 26, 2007 12:29 pm
- 1 Replies
- 1233 Views
- Last post by mesherm
Mon Mar 26, 2007 1:36 pm
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- Are high (?) capacitance cables ok with ST70 (VTA'd driver)
by Guest » Sat Mar 03, 2007 11:48 pm
- 3 Replies
- 1772 Views
- Last post by mesherm
Tue Mar 13, 2007 4:44 pm
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- Best sounding output trannies
by Andrea80 » Mon Dec 04, 2006 6:08 am
- 9 Replies
- 5641 Views
- Last post by Cobra2
Sun Mar 11, 2007 11:44 am
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- Power transformer(s) for st70 clone
by kheper » Fri Mar 09, 2007 9:43 pm
- 7 Replies
- 4136 Views
- Last post by Shannon Parks
Sun Mar 11, 2007 6:18 am
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- Toroidal PT (and new driver board?) to quiet a Stereo 70
by bsmif » Tue Mar 06, 2007 2:18 pm
- 10 Replies
- 5229 Views
- Last post by Shannon Parks
Wed Mar 07, 2007 6:19 am
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- Comparison to H.H. Scott 222-D
by dcriner » Tue Mar 06, 2007 7:55 pm
- 0 Replies
- 1833 Views
- Last post by dcriner
Tue Mar 06, 2007 7:55 pm
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- ST-70 Upgrade boards
by Guest » Wed Feb 28, 2007 11:59 am
- 3 Replies
- 1842 Views
- Last post by EWBrown
Thu Mar 01, 2007 8:25 am
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- transplanted output transformers
by Wharfcreek » Mon Feb 19, 2007 7:51 pm
- 2 Replies
- 1977 Views
- Last post by mesherm
Mon Feb 19, 2007 9:13 pm
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- About that rectifier...
by kheper » Fri Feb 16, 2007 11:38 am
- 4 Replies
- 2476 Views
- Last post by kheper
Mon Feb 19, 2007 4:35 pm
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- Changing coupling cap values / Using russian teflon caps
by EdStiles » Fri Feb 09, 2007 6:47 pm
- 2 Replies
- 2569 Views
- Last post by EWBrown
Thu Feb 15, 2007 9:38 am
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- unloaded voltage readings
by jeffdavison » Sun Feb 04, 2007 10:37 am
- 34 Replies
- 14347 Views
- Last post by mesherm
Wed Feb 14, 2007 8:13 pm
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- What would YOU do?
by mesherm » Thu Nov 02, 2006 11:56 am
- 14 Replies
- 9690 Views
- Last post by EdStiles
Fri Feb 09, 2007 8:19 pm
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- st70 start up problems (smoking)
by kheper » Fri Feb 02, 2007 1:07 pm
- 19 Replies
- 8842 Views
- Last post by EWBrown
Thu Feb 08, 2007 8:31 am
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- dynakits
by Guest » Thu Aug 03, 2006 6:55 pm
- 3 Replies
- 2620 Views
- Last post by Brinkman
Fri Feb 02, 2007 9:53 pm
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- HF-87 copy?
by TerrySmith » Sat Jan 27, 2007 9:01 am
- 0 Replies
- 1664 Views
- Last post by TerrySmith
Sat Jan 27, 2007 9:01 am
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- st70 chassis template
by kheper » Tue Jan 23, 2007 4:08 am
- 6 Replies
- 3486 Views
- Last post by EWBrown
Tue Jan 23, 2007 12:58 pm
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- Finished the wiring, another 10 lbs stuffed in a 2 lb bag
by jeffdavison » Fri Jan 12, 2007 4:19 pm
- 10 Replies
- 5567 Views
- Last post by mesherm
Sat Jan 13, 2007 3:43 am
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- These are new...Do they work? Choked chokes!
by jeffdavison » Fri Jan 05, 2007 4:48 pm
- 3 Replies
- 2235 Views
- Last post by Uncle Ned
Thu Jan 11, 2007 2:19 am
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- twisted pair question...
by jeffdavison » Sat Jan 06, 2007 3:40 pm
- 1 Replies
- 1572 Views
- Last post by erichayes
Sat Jan 06, 2007 5:34 pm
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- Purpose of the Resistor between pin 5 and 6 on the EL34s
by Guest » Wed Jan 03, 2007 9:33 pm
- 8 Replies
- 2733 Views
- Last post by WA4SWJ
Thu Jan 04, 2007 9:17 am
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- Yea or Nea on input bandwitdh filtering?
by jeffdavison » Sat Dec 23, 2006 2:05 am
- 8 Replies
- 4478 Views
- Last post by Uncle Ned
Fri Dec 29, 2006 6:42 am
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- WE 422A swap ?
by jeffdavison » Thu Dec 28, 2006 3:20 am
- 1 Replies
- 2021 Views
- Last post by Uncle Ned
Fri Dec 29, 2006 6:31 am
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- new guy, new post to say hello!
by Guest » Sat Dec 16, 2006 7:22 am
- 1 Replies
- 1365 Views
- Last post by TomMcNally
Sat Dec 16, 2006 10:04 am
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- 10 lbs of stuff in a 9 lb toroid amp
by mesherm » Mon Dec 11, 2006 9:36 pm
- 23 Replies
- 10921 Views
- Last post by EWBrown
Fri Dec 15, 2006 9:39 am
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- Using ST-70 for tube matching (w/o tube tester) - comments?
by dcriner » Mon Dec 11, 2006 2:42 pm
- 10 Replies
- 5141 Views
- Last post by Blackburn Audio
Tue Dec 12, 2006 11:30 pm
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- ST70 Rectifier Tube Alternatives
by dcriner » Wed Nov 15, 2006 7:28 pm
- 7 Replies
- 3955 Views
- Last post by jeffdavison
Tue Dec 12, 2006 4:42 pm
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- A test post from the new guy
by K4ECA » Sat Dec 09, 2006 7:25 pm
- 4 Replies
- 2388 Views
- Last post by sorenj07
Sun Dec 10, 2006 10:06 am
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- Triode mode questions
by jeffdavison » Thu Dec 07, 2006 12:35 pm
- 3 Replies
- 2026 Views
- Last post by EWBrown
Fri Dec 08, 2006 8:20 am
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- Dual Bias supplies on a ST70 ?
by EdStiles » Tue Aug 15, 2006 8:42 pm
- 25 Replies
- 11546 Views
- Last post by erichayes
Thu Nov 30, 2006 4:06 pm
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- Choke....substitute???
by jeffdavison » Thu Nov 30, 2006 1:58 am
- 3 Replies
- 2308 Views
- Last post by Shannon Parks
Thu Nov 30, 2006 6:21 am
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- Hammond question
by Gregt01 » Mon Nov 20, 2006 1:08 pm
- 2 Replies
- 1909 Views
- Last post by Gregt01
Tue Nov 21, 2006 12:50 am
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- Fusing -- ST70
by dcriner » Thu Nov 16, 2006 10:34 am
- 4 Replies
- 2866 Views
- Last post by EWBrown
Fri Nov 17, 2006 6:19 am
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- Reaffirmation
by WA4SWJ » Sun Nov 12, 2006 4:42 pm
- 2 Replies
- 1919 Views
- Last post by WA4SWJ
Mon Nov 13, 2006 6:12 am
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- Quick Fix of 60-Hz Hum in My ST-70
by dcriner » Sat Nov 11, 2006 4:44 pm
- 2 Replies
- 2109 Views
- Last post by dcriner
Sun Nov 12, 2006 8:16 am
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- Drifting Bias Readings
by leadtower » Wed Nov 08, 2006 1:01 pm
- 12 Replies
- 5108 Views
- Last post by leadtower
Thu Nov 09, 2006 8:03 pm
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- fuse blowing now and then.. ideas?
by guitarpsych » Sat Oct 21, 2006 12:46 pm
- 5 Replies
- 2502 Views
- Last post by s2kov
Sun Oct 22, 2006 3:55 am
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- St 70 channel out
by leadtower » Fri Oct 13, 2006 12:53 pm
- 3 Replies
- 1945 Views
- Last post by Shannon Parks
Fri Oct 13, 2006 2:38 pm
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- The amp is done!
by Wmacky » Sun Jul 16, 2006 5:20 pm
- 6 Replies
- 3730 Views
- Last post by snitch56
Tue Oct 10, 2006 7:04 pm
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- Output Tubes
by leadtower » Sun Oct 01, 2006 3:46 pm
- 15 Replies
- 9749 Views
- Last post by Blackburn Audio
Fri Oct 06, 2006 10:16 pm
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