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Topics	Replies	Author	Views	Last Posts
New to me ST120 blown 6550 & 5AR4	3	batman7349	518	Sat Jan 20, 2024 8:28 pm by batman7349
Bi-Amping mismatch amp	7	denis14	625	Sat Jan 20, 2024 4:14 pm by knotscott
Mono TCLA Preamp & 78 Phonostage In PAM Chassis	0	jwb474	329	Sun Jan 14, 2024 5:07 am by jwb474
Vu meters	0	Ernestwithanage	329	Sun Jan 14, 2024 2:22 am by Ernestwithanage
Which preamp to buy to use with my ST70?	9	Hardwhistle	987	Mon Jan 08, 2024 10:56 pm by Hardwhistle
Power Cable Upgrade	3	VTHokie83	742	Mon Jan 08, 2024 3:37 pm by Bob Latino
ST70 power transformer	5	itrfguy	936	Fri Jan 05, 2024 10:17 pm by Cubdriver
Dynaco PAS 4 Phono stage is almost so low it's inaudible	14	45scratches	578	Wed Jan 03, 2024 9:10 pm by Tubes4ever
VTA ST-70 problem	6	Chris A	847	Wed Jan 03, 2024 9:03 am by Chris A
12AU7 Tube Choice	6	snip73	602	Wed Jan 03, 2024 7:46 am by snip73
ST70 Bias Unstable, Oscillation	17	NIBW	1220	Tue Jan 02, 2024 11:25 am by Solder Slinger
Right channel output intermittent	0	ljderek	286	Mon Jan 01, 2024 9:49 pm by ljderek
KT88's in the ST70? 1, 2	27	Guest	7252	Mon Jan 01, 2024 8:19 pm by fedoragent
New PAS Build	0	jwb474	248	Sun Dec 31, 2023 6:39 pm by jwb474
AC Voltage On Chassis	2	rudes	343	Sat Dec 30, 2023 10:15 am by rudes
VTA-ST120: variac fuse blows when the TDR switches on the "power circuits".	7	alexbramford	824	Fri Dec 22, 2023 12:59 pm by peterh
7 lug terminal strip wiring	2	steve46	518	Sun Dec 17, 2023 11:31 am by steve46
Has anyone tried these tubes in St-120? PREFERRED SERIES KT88	1	smoorenc	486	Fri Dec 15, 2023 1:00 am by ArlanB
Wattage of 10 ohm bias sensing resistors.	2	Viridian2	332	Sat Dec 09, 2023 5:52 pm by Viridian2
ST70 el34 bias low	13	directmetalmonster	1628	Sat Dec 09, 2023 12:57 pm by Bob Latino
dual rectifiers for ST120 & ST70 amps 1, 2	30	Roy Mottram	4997	Sat Dec 02, 2023 6:27 pm by GAflubug
VTA M-125's and 16 ohm speakers	5	Audiosoldier1979	575	Fri Dec 01, 2023 11:36 am by Seamus
Bias PAnel meter install	2	Brap	569	Fri Dec 01, 2023 9:40 am by Brap
Telefunken Black Diamond ECC82	4	Brap	419	Fri Dec 01, 2023 9:35 am by Brap
Update to Post from last Summer	1	mwagn_1	416	Thu Nov 30, 2023 11:59 pm by Wharfcreek
SP14 losing right channel when warm	6	Dusterdave	1776	Mon Nov 27, 2023 11:42 pm by Dusterdave
VTA ST-120	5	stelian99	1035	Wed Nov 22, 2023 2:09 pm by smoorenc
REPLACED power transformer ST-70	1	corey thompson	588	Tue Nov 21, 2023 1:16 pm by Dan W
ST-70 speaker question	11	dbster	834	Fri Nov 17, 2023 1:21 pm by Brap
Newbie problems with a ST-70 rebuild VTA70 driver board / bias display: no sound 1, 2	25	fmzip	1791	Thu Nov 16, 2023 2:21 pm by Roy Mottram
Wow freshly restored . But it now does not work s70 .	6	corey thompson	460	Thu Nov 16, 2023 8:54 am by Bob Latino
Vinyl records now outselling CD's ! hard to believe ?	4	Bob Latino	609	Mon Nov 13, 2023 3:41 am by jwb474
6.8K MK4 Can Cap Resistor 1/2 or 1 Watt?	2	bubbasweet	400	Mon Oct 30, 2023 8:44 am by WLT
High bias on Mark IV amps	10	stevenally	3240	Thu Oct 26, 2023 4:30 pm by bubbasweet
PAS4 Preamp 1, 2	34	StereoGaryo	12855	Sun Oct 22, 2023 11:21 am by Mazen0822
5AR4 Tubes Keep Failing	2	rudes	658	Sat Oct 21, 2023 9:55 pm by Roy Mottram
SP14 Preamp assembly project	1	Rafael0510	493	Sat Oct 21, 2023 9:47 pm by Roy Mottram
VTA-ST120 - Low bias on all four power tubes	4	alexbramford	735	Tue Oct 17, 2023 8:07 pm by alexbramford
ST-120 Dual Rectifier Upgrade	3	penguinpages	1693	Mon Oct 16, 2023 9:09 am by smoorenc
Where is tubes4hifi dot com?	2	ttocs	519	Sun Oct 15, 2023 9:35 am by Dan W
New Erhard PAS Upgrade Forum	0	jwb474	443	Fri Oct 13, 2023 11:15 pm by jwb474
VTA-70 Bias Resistor	7	Benevox	594	Wed Oct 11, 2023 3:21 pm by itrfguy
PAS 2 Hum identification and isolation help	1	bubbasweet	283	Thu Oct 05, 2023 9:39 pm by bubbasweet
Think I toasted my Power Transformer, how do I test it?	10	evangerardo	1371	Wed Oct 04, 2023 2:13 am by evangerardo
ST120 power section oscillation using Pavel's AB-Qi ST70/120 autobias board	21	HDroller	1351	Wed Oct 04, 2023 1:20 am by pavlikkkk
Little sound from left channel	5	Scillitoe	467	Mon Oct 02, 2023 5:58 pm by peterh
No sound from system	5	Dusterdave	439	Mon Oct 02, 2023 11:49 am by Dusterdave
ST70 Voltages High	3	moodyj2000	378	Tue Sep 26, 2023 4:27 pm by Bob Latino
Catastrophic failure of my VTA ST70	11	James_Weir	1087	Fri Sep 22, 2023 1:10 pm by James_Weir
ST-70 Dual Rectifier V2 install questions	1	James_Weir	696	Fri Sep 22, 2023 3:25 am by James_Weir