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Topics	Replies	Author	Views	Last Posts
blown tubes	0	Roy Mottram	1401	Thu Jun 08, 2023 7:51 pm by Roy Mottram
VTA M-125 amp videos	7	Bob Latino	1201	Thu Jun 08, 2023 4:07 pm by Dan W
PH 14 phone amp hum	4	Jim	508	Tue Jun 06, 2023 1:36 pm by Jim
Ruby 5U4GC Red Plating	18	Tom Pickett	1188	Mon May 29, 2023 4:41 pm by Roy Mottram
Preamplifier & Power Amplifier Compatibility	3	TN Allen	548	Mon May 29, 2023 4:33 pm by Roy Mottram
A Couple Of Front Panel Queries	7	jwb474	673	Mon May 29, 2023 11:26 am by jwb474
Ph 14 phone amp	2	Jim	425	Mon May 29, 2023 8:00 am by Jim
Sound stopped working on VTA120	8	Pezcore67	631	Thu May 25, 2023 4:17 pm by Pezcore67
M-125 : Socket screws	12	SixOhms	1022	Tue May 23, 2023 11:06 am by Seamus
MKIII Bias Not Controllable	8	snip73	783	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	13412	Fri May 19, 2023 12:27 pm by stewdan
Dynaco A-25 Mark2 1978	0	Mark Korda	351	Mon May 15, 2023 4:14 pm by Mark Korda
What about KT-66?	9	MarcVBelgium	3403	Mon May 15, 2023 8:38 am by Brap
Loud squealing noise from one channel when powering off.	15	Kettnet	995	Tue May 02, 2023 8:58 pm by Solder Slinger
Sutherland solid state driver board for the Dynaco ST-70	7	Bob Latino	4675	Thu Apr 27, 2023 3:03 pm by sbradley02
New guy : new amps	7	SixOhms	718	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	950	Sat Apr 22, 2023 10:30 am by Seamus
ST70 blows 5 amp fuse	7	vincentdsnt	799	Fri Apr 21, 2023 8:53 pm by Big Harry
mk 3 tubes	9	JohnS	822	Tue Apr 04, 2023 6:20 pm by JohnS
Power Tower	9	CletusB	896	Sat Apr 01, 2023 11:35 am by CletusB
ST70 No Bias	14	Isstatu1	1244	Thu Mar 30, 2023 5:36 pm by fredeb
Working on dynaco pots	7	carcy	1013	Thu Mar 30, 2023 12:28 pm by carcy
What are three three holes in the plates of a KT88 Tetrode for?	3	alexbramford	667	Tue Mar 28, 2023 10:55 am by Seamus
ST70 HUM on New Build Single Channel	4	moodyj2000	460	Mon Mar 27, 2023 5:24 pm by Chad Spackman
Newbie PAS2 help	3	zapped1	447	Fri Mar 24, 2023 2:25 am by peterh
Dynaco ST70 speaker pops on power down	9	pdxwaker	616	Tue Mar 21, 2023 9:53 pm by pdxwaker
Dynaco Mark II to III conversion - tubes4hifi + SDS Labs	3	tacuba	493	Mon Mar 20, 2023 1:44 pm by peterh
ST70 - Tube heater center tap capacitor	1	Don_U	329	Mon Mar 20, 2023 10:47 am by Rec
Dual PAM-1 & DSC-1 Front Panel	2	jwb474	265	Sat Mar 18, 2023 3:04 pm by jwb474
VT-120 Tubes won't bias	8	subman	1088	Fri Mar 17, 2023 1:10 pm by Tubes4ever
start up mk 3	0	JohnS	287	Wed Mar 15, 2023 9:33 pm by JohnS
can't get rid of hum st 70 + PAS 3x or st70 + PAS-NGT	15	DrBrown	749	Wed Mar 15, 2023 7:19 pm by DrBrown
Ok to balance 70/30 input?	0	Njrob	200	Wed Mar 15, 2023 5:27 pm by Njrob
Mk III Bias issues	11	stevenally	2157	Wed Mar 15, 2023 2:36 pm by peterh
M125 Re do and autobias install.	10	Rec	968	Sun Mar 12, 2023 4:40 pm by Rec
Upgrading my VTA st-70 so I can use KT-88 tubes	8	truebluephil	1076	Fri Mar 10, 2023 10:00 pm by Bob Latino
ST70 humming with inputs shorted	19	DrBrown	826	Fri Mar 10, 2023 12:06 pm by peterh
What would cause -70vac at the -50vac st120	13	Njrob	422	Tue Mar 07, 2023 2:29 pm by Bob Latino
Rectifier thermistor won't do the trick. Ametherm responds	3	Njrob	437	Mon Mar 06, 2023 3:40 pm by Njrob
Decisions, Decisions, Decisions!	11	Allang	2599	Sat Mar 04, 2023 10:04 pm by Njrob
Ditched the thermistor new measurements here	0	Njrob	244	Thu Mar 02, 2023 11:43 pm by Njrob
What good is a thermistor on a solid state rectifier?	8	Njrob	459	Thu Mar 02, 2023 3:13 pm by Njrob
12at7 center high pitch noise vta120	4	Njrob	206	Thu Mar 02, 2023 2:43 pm by Njrob
Link to Dynaco SCA-35 rebuild article - good information	8	Bob Latino	10650	Wed Mar 01, 2023 1:31 pm by Oldtube
FM-5 Tuner Weak & In/Out Receive	4	8xlaxx	1891	Tue Feb 28, 2023 10:05 pm by Njrob
The Perfect Gift 1, 2	33	CletusB	1781	Tue Feb 28, 2023 9:09 am by Brap
Shaky bias experience	3	Albert	526	Mon Feb 27, 2023 10:11 am by Albert
BASS pot for an sca-35 dynaco	9	carcy	460	Mon Feb 27, 2023 12:56 am by New2Tubez
220V to 110V for a PAS-3 or SCA35 Dynaco	5	carcy	667	Fri Feb 24, 2023 10:51 am by billinrio
Speaker load on ST-120	10	monkuboy	1211	Thu Feb 23, 2023 11:16 pm by Tubes4ever