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Topics	Replies	Author	Views	Last Posts
wiring new banana speaker posts with original ST 70 output transformers	3	James_Weir	619	Sat Sep 02, 2023 2:47 pm by Knobs
Adding auxillary filament transformer?	3	arficus	451	Tue Aug 29, 2023 10:10 am by New2Tubez
LM344 possible failure on vta st-70 driver board.	4	fzapped	376	Sun Aug 27, 2023 5:08 pm by Bob Latino
Wire Extension - Proper method	2	penguinpages	410	Sat Aug 26, 2023 4:53 pm by Big Harry
Need Help Getting Bias Right For KT66 On An Original ST70 1, 2	26	evangerardo	1828	Sat Aug 26, 2023 12:22 pm by Seamus
SDS LABS Capacitor Board Dynaco PAS 3	4	fmzip	392	Fri Aug 25, 2023 9:28 pm by fmzip
Tube Tester - Recommendations	8	penguinpages	1192	Fri Aug 25, 2023 7:57 pm by Seamus
What to do?	8	settador	456	Fri Aug 25, 2023 10:12 am by settador
ST-120 - Debug / Repair Left Rear 20vdc	12	penguinpages	568	Thu Aug 24, 2023 10:01 pm by penguinpages
Speaker AB Switch	4	rwbaker	349	Sat Aug 19, 2023 12:52 am by peterh
Hiss/Whoosh Sound ST-120	13	krcrisp	660	Fri Aug 18, 2023 7:49 pm by Roy Mottram
Coupling Cap Substitutions?	15	vtshopdog	3503	Thu Aug 17, 2023 8:14 am by Buck_R0gers
ST70 bias is .56 instead of 1.56	6	CAEMI	584	Thu Aug 17, 2023 8:09 am by Buck_R0gers
Capacitor and sound quality	18	Sprags	7370	Fri Aug 11, 2023 12:48 am by pedrocols
Power switch wiring.	3	Njrob	498	Thu Aug 10, 2023 4:32 pm by Roy Mottram
digital bias meters	0	Roy Mottram	649	Thu Aug 10, 2023 2:14 pm by Roy Mottram
Tubes for VTA ST-120	11	Hops	1348	Sat Aug 05, 2023 10:44 pm by Njrob
ANNOUNCEMENT about Tubes4HiFi	2	Roy Mottram	4534	Tue Aug 01, 2023 12:39 am by New2Tubez
my first st 70	7	Scott from west seneca	448	Thu Jul 27, 2023 12:16 pm by peterh
Vtast120 and the new fuse kit questions.	3	Njrob	582	Thu Jul 27, 2023 11:30 am by Roy Mottram
New (Old) Guy	3	mwagn_1	653	Fri Jul 14, 2023 5:38 pm by Brap
Hammond 1650E	4	Junksleep	655	Thu Jul 13, 2023 8:09 pm by Dan W
Ph 14 looking manual	1	Jim	1075	Mon Jul 03, 2023 4:59 pm by Dale Stevens
looking for volume and selector knobs for dynaco pas2 1, 2	34	vuejaday	1985	Fri Jun 30, 2023 12:44 pm by vuejaday
PAS 3 Shielded Phono Cabling	1	moodyj2000	1176	Thu Jun 29, 2023 7:04 pm by jwb474
SCA 35 trouble	8	Junksleep	862	Tue Jun 27, 2023 6:53 pm by Roy Mottram
Octal driver board when used for VTA ST-120	1	StevieRay	1376	Tue Jun 27, 2023 6:51 pm by Roy Mottram
I have a pair of Dynaco original Mark IV's. One is dead. The other is playing but.....	2	ng8264723	525	Mon Jun 26, 2023 8:50 am by WLT
blown tubes	1	Roy Mottram	716	Thu Jun 08, 2023 9:14 pm by New2Tubez
blown tubes	0	Roy Mottram	1475	Thu Jun 08, 2023 7:51 pm by Roy Mottram
VTA M-125 amp videos	7	Bob Latino	1228	Thu Jun 08, 2023 4:07 pm by Dan W
PH 14 phone amp hum	4	Jim	534	Tue Jun 06, 2023 1:36 pm by Jim
Ruby 5U4GC Red Plating	18	Tom Pickett	1261	Mon May 29, 2023 4:41 pm by Roy Mottram
Preamplifier & Power Amplifier Compatibility	3	TN Allen	615	Mon May 29, 2023 4:33 pm by Roy Mottram
A Couple Of Front Panel Queries	7	jwb474	720	Mon May 29, 2023 11:26 am by jwb474
Ph 14 phone amp	2	Jim	462	Mon May 29, 2023 8:00 am by Jim
Sound stopped working on VTA120	8	Pezcore67	668	Thu May 25, 2023 4:17 pm by Pezcore67
M-125 : Socket screws	12	SixOhms	1092	Tue May 23, 2023 11:06 am by Seamus
MKIII Bias Not Controllable	8	snip73	831	Mon May 22, 2023 12:43 pm by Seamus
Poor man's solid state replacement rectifier for Dynaco ST-70, Mark II, Mark III or Mark IV	16	Bob Latino	13828	Fri May 19, 2023 12:27 pm by stewdan
Dynaco A-25 Mark2 1978	0	Mark Korda	390	Mon May 15, 2023 4:14 pm by Mark Korda
What about KT-66?	9	MarcVBelgium	3517	Mon May 15, 2023 8:38 am by Brap
Loud squealing noise from one channel when powering off.	15	Kettnet	1072	Tue May 02, 2023 8:58 pm by Solder Slinger
Sutherland solid state driver board for the Dynaco ST-70	7	Bob Latino	4789	Thu Apr 27, 2023 3:03 pm by sbradley02
New guy : new amps	7	SixOhms	762	Sat Apr 22, 2023 1:43 pm by Bob Latino
Time delay board, UF4007 resistor mod, KT88 GL and Tung Sol/Sovtek KT120 questions	9	45scratches	1003	Sat Apr 22, 2023 10:30 am by Seamus
ST70 blows 5 amp fuse	7	vincentdsnt	864	Fri Apr 21, 2023 8:53 pm by Big Harry
mk 3 tubes	9	JohnS	869	Tue Apr 04, 2023 6:20 pm by JohnS
Power Tower	9	CletusB	929	Sat Apr 01, 2023 11:35 am by CletusB
ST70 No Bias	14	Isstatu1	1295	Thu Mar 30, 2023 5:36 pm by fredeb