The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products


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No new posts   ST-120 tube redplate. Not a bad cathode resistor. what to check? 5ChetJettison223View latest post Tue Sep 27, 2022 1:59 pm
by peterh
No new posts   VTA 120 hum then high voltage at one pin 1Beachlandguy279View latest post Wed Sep 21, 2022 2:26 am
by peterh
No new posts   PH16 tube rolling positions question 19mdelrossi1648View latest post Fri Sep 16, 2022 1:05 pm
by carlsor
No new posts   PAS Circuit Question 2breading420View latest post Fri Sep 16, 2022 12:15 am
by daveshel
No new posts   Coupling caps for 6SN7 driver board question 1Telescope12350View latest post Mon Sep 12, 2022 3:43 pm
by Bob Latino
No new posts   MK3s new build issue 5MHProd595View latest post Sun Sep 11, 2022 12:55 am
by MechEngVic
No new posts   Bad mechanical hum after installing Chinese "KT88" PSvane tubes and blowing 4 rectifiers 9arremondo786View latest post Sun Sep 11, 2022 12:44 am
by MechEngVic
No new posts   85 deg C capacitor--advisable for VTA board? 2colin86325278View latest post Sat Sep 10, 2022 2:00 pm
by colin86325
No new posts   Rebuilding my M125s - can I use this cap in the SCM module? 1, 2, 356rebellovw3194View latest post Wed Sep 07, 2022 3:10 pm
by rebellovw
No new posts   Psvane KT88C and ST-120 5smoorenc575View latest post Tue Sep 06, 2022 12:13 pm
by New2Tubez
No new posts   Poor man's solid state replacement rectifier for Dynaco ST-70, Mark II, Mark III or Mark IV 9Bob Latino10748View latest post Mon Sep 05, 2022 6:34 pm
by lorne
No new posts   ST-70 chassis ground 4bootstrapjesse424View latest post Sun Sep 04, 2022 4:23 pm
by bootstrapjesse
No new posts   Interesting ST 70 1Dave_in_Va511View latest post Tue Aug 30, 2022 5:39 pm
by Bob Latino
No new posts   Increase Bias Supply -Voltage 6TubesGlo787View latest post Wed Aug 17, 2022 10:07 pm
by fredeb
No new posts   Mark 3 fuse blows after hours of use 7jrethorst572View latest post Wed Aug 17, 2022 1:33 pm
by Bob Latino
No new posts  [ Poll ]  New PCB color option? 1Dan W754View latest post Mon Aug 15, 2022 8:29 pm
by Gabriel
No new posts   Stereo/Mono Switch.... 5wolverine10324View latest post Fri Aug 12, 2022 7:08 am
by lorne
No new posts   PCB Color Polls 2jwb474341View latest post Fri Aug 05, 2022 11:18 am
by DavidR
No new posts   Paint Color? 2Joe302428View latest post Tue Aug 02, 2022 4:03 pm
by Joe302
No new posts   ST-70 NO BIAS 14joseramonnavarro656View latest post Thu Jul 28, 2022 6:21 pm
by tubes4hifi
No new posts   New PSVANE KT88 and my Dynaco MK3s 4bubbasweet615View latest post Wed Jul 27, 2022 6:05 pm
by arremondo
No new posts   Starting the st120 up without speakers 6jsl1234498View latest post Tue Jul 26, 2022 8:14 am
by cci1492
No new posts   EL 34 tubes in Mark 3 amp 14jrethorst659View latest post Thu Jul 21, 2022 3:10 pm
by WLT
No new posts   Dyna Mk lll question 6MarkS57455View latest post Thu Jul 21, 2022 9:52 am
by peterh
No new posts   Help, ST-70 bias issue and single output tube glowing 5raudio44730View latest post Thu Jul 21, 2022 5:10 am
by raudio44
No new posts   Tubes4HiFi update 1tubes4hifi1195View latest post Wed Jul 20, 2022 3:55 pm
by DavidR
No new posts   5500 Ohm primary CT on A470? 2bootstrapjesse288View latest post Mon Jul 18, 2022 3:09 pm
by bootstrapjesse
No new posts   Dynaco ST70 el34 bias  5directmetalmonster702View latest post Mon Jul 18, 2022 1:18 pm
by bootstrapjesse
No new posts   Rectifier tube keeps blowing???? 7Surfing1549View latest post Wed Jul 13, 2022 10:11 pm
by New2Tubez
No new posts   M-125 Tube Rectifier 5U4 or 5AR4? 8ttocs706View latest post Wed Jul 13, 2022 12:10 pm
by Seamus
No new posts   M125 monoblock 4Dynacanuck636View latest post Wed Jul 13, 2022 11:38 am
by Seamus
No new posts   The Dynaco (Panor) ST-80 and ST-160 tube amps of the mid '90's 13Bob Latino8642View latest post Wed Jul 13, 2022 1:07 am
by Thx1326
No new posts   My beautiful GZ37 shows some dark/burn on inside glass - but still works fine and the amp biases just fine... 4rebellovw333View latest post Sun Jul 10, 2022 9:07 pm
by rebellovw
No new posts   Dynaco ST70 with yellow sheet mod and SS rectifier?  3crackerjack537View latest post Fri Jul 08, 2022 1:45 pm
by lorne
No new posts   Power Transformer Options - ST-70 1, 238Aljaheejus10590View latest post Sun Jul 03, 2022 1:35 pm
by AAT3
No new posts   Volume loss when splitting line out signal 4breading527View latest post Sun Jul 03, 2022 10:51 am
by Seamus
No new posts   ST-70 rectifier diode mod novice question 6raudio44925View latest post Tue Jun 28, 2022 2:32 am
by raudio44
No new posts   Recommend mid priced speakers for the 120 amplifier. 8Gabriel584View latest post Mon Jun 27, 2022 11:21 am
by VTHokie83
No new posts   Switch from 5AR4 to 5U4 Rectifier 10BryceJ1405View latest post Mon Jun 27, 2022 9:50 am
by Tubes4ever
No new posts   Zero Bias all 4 tubes and no output to speakers 6eminence1963804View latest post Fri Jun 24, 2022 8:15 pm
by Gabriel
No new posts   Found a nice external VU meter (and more) 0jasn54455View latest post Thu Jun 23, 2022 1:45 pm
by jasn54
No new posts   VTA ST120 Bias Adjustment 1, 2, 356guentherj210264View latest post Sun Jun 19, 2022 4:04 pm
by jvinhj240
No new posts   VTA SP12 and PH12 Build Thread 1, 2, ... , 5, 6144edgobb11582View latest post Mon Jun 06, 2022 3:04 pm
by tubes4hifi
No new posts   VTA-ST120 - speaker terminals question 2alexbramford350View latest post Wed Jun 01, 2022 8:17 pm
by alexbramford
No new posts   78 RPM Record Phono Pre-Amp EQ Selection Advice Wanted 7jwb474596View latest post Thu May 26, 2022 1:40 am
by jwb474
No new posts   Does Anyone Recognize This PC-3 Driver Board From Audio Sound Lab? 8davidmac51050View latest post Sun May 22, 2022 7:36 pm
by Buckoff
No new posts   VTA ST-120, Power Tube Redplate, Bias reading 25v!? 10ChetJettison933View latest post Wed May 18, 2022 8:05 pm
by ChetJettison
No new posts   KT88 vs 6550 9Greg_M10526View latest post Sat May 14, 2022 1:03 pm
by Jim McShane
No new posts   6550 replacing KT66 in VTA ST-70 10Brap918View latest post Sat May 14, 2022 12:11 pm
by truebluephil
No new posts   PAS 3 Power Supply 9harris925View latest post Wed May 11, 2022 6:19 am
by harris
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