SS rectification and ST-70

209.240.161.174

Posted by Tom Kuhn on July 12, 1999 at 21:58:50

In Reply to: oh brother, Doc gets preachy again. posted by Doc B. on July 12, 1999 at 09:01:15:

I'm fairly new to tube audio, but decided to give it a try with an ST-70 and Pilot tube preamp. The sound is much superior to my JVC receiver with one exception - sloppy bass. Much as you described, plenty of it, but slow and muddy on fast passages. I've posted on this elsewhere and can generally group the answers into two camps: 1-excessive negative feedback due to too small coupling caps. 2-weak power supply. Being on a budget, I'd love to try the tweaked UF4007's, but lack the experience or knowledge to know what else needs to be changed to compliment that change. Specifically, would I retain the choke? The LCR 40-20-20-20 cap that I used in the rebuild is rated at 500 volts. Would I need to go with a cap of higher rating due to the instant unloaded turn-on? Should I increase the capacitance of any or all sections? I know this isn't exactly on subject with the original post, but I'm hoping that someone might take the time to share some knowledge with a newbie. Thanks very much. Tom Kuhn

This post is made possible by the generous support of people like you and our sponsors:

Follow Ups Full Thread

Topic - To Doc B.: Tube used as active load for your preamp. - Tom S. 05:27:40 07/12/99 (23)

oh brother, Doc gets preachy again. - Doc B. 09:01:15 07/12/99 (23)

SS rectification and ST-70 - Tom Kuhn 21:58:50 07/12/99 (2)

Re: SS rectification and ST-70 - john curl 15:25:23 07/15/99 (0)

Hehehe....... - Tom S. 10:14:26 07/12/99 (19)

Re: Hehehe....... - Jack G 11:01:22 07/12/99 (8)

Re: Hehehe....... - Tom S. 11:45:15 07/12/99 (7)

Re: Hehehe....... - Jack G 04:57:18 07/13/99 (6)

Re: Hehehe....... - Tom S. 05:44:09 07/13/99 (5)

Re: Hehehe....... - Doc B. 08:45:00 07/13/99 (4)

Re: Hehehe....... - Jack g 08:56:57 07/13/99 (2)

Re: Hehehe....... - Doc B. 14:00:46 07/13/99 (1)

good point.(nt) - Jack G 04:54:05 07/14/99 (0)

Re: Hehehe....... - Tom S. 08:56:11 07/13/99 (0)

Re: Hehehe....... - Doc B. 10:51:25 07/12/99 (9)

I can prove it!! - Quest 11:39:55 07/12/99 (8)

MUR Series Rects.... - Thorsten 02:46:29 07/14/99 (4)

Re: MUR Series Rects.... - Brad 02:17:42 07/16/99 (1)

thanks Brad :-) (nt) - Quest 08:33:51 07/16/99 (0)

my dear friend Thorsten.. - Quest 11:42:30 07/15/99 (0)

Thanks again Thorsten :-> (nt) - Quest 11:35:11 07/15/99 (0)

Re: I can prove it!! - Doc B. 14:12:05 07/12/99 (2)

Re: UF4007 - MIKE 17:40:05 07/12/99 (1)

Re: UF4007 - Doc B. 20:39:47 07/12/99 (0)

Follow Ups

SS rectification and ST-70 - Tom Kuhn 21:58:50 07/12/99 (2)

Re: SS rectification and ST-70 - john curl 15:25:23 07/15/99 (0)

You can not post to an archived thread.