Search found 22 matches

by garyb
Sat 7 May 2016 16:03
Forum: High-end preamplifiers
Topic: My SL-10 should be here soon
Replies: 1
Views: 1381

Re: My SL-10 should be here soon

Andrew, If you've done your research then you've probably stumbled across the posts that I made about restoring my SL-10 preamp. Take a look here: http://www.thresholdlovers.com/forum/viewtopic.php?f=7&t=389 Since the Black Gate capacitors that I used are no longer available, I'd suggest your us...
by garyb
Sun 20 Mar 2016 01:49
Forum: High-end preamplifiers
Topic: Threshold FET 10 Power supply
Replies: 3
Views: 1503

Re: Threshold FET 10 Power supply

Andy, Which version of the FET 10 do you have, the 10he or the 10hl? The FET 10he has round knobs. They use similar power supplies but the umbilical cord connector is different between them. The power supply puts out +-24v DC. Attached is a schematic of the original power supply of the 10hl. The 10h...
by garyb
Tue 5 Mar 2013 04:14
Forum: Introduce yourself
Topic: Hello
Replies: 1
Views: 1528

Re: Hello

Hi everyone! After years in this hobby, I was finally able to get myself one of my dream audio brands, Threshold! 8-) I was lucky enough to get in the used market a S150 Series 2 power amp. Everything seems to be ok, and the sound is fantastic. Welcome. I own an S200/II, which is an upgraded versio...
by garyb
Tue 3 Jan 2012 16:51
Forum: High-end preamplifiers
Topic: Threshold FET 10e and 10pe - phono and line stages
Replies: 8
Views: 5550

Re: Threshold FET 10e and 10pe - phono and line stages

. . . I may try changing the feedback resistors around the gain stage. This would be the 10K / 1K resistors labeled R115 (R215) and R116 (R216). In some of the discussions on diyaudio, John Curl has reported that a high quality feedback resistor could make or break the sound of his design. So it se...
by garyb
Tue 20 Dec 2011 15:24
Forum: High-end preamplifiers
Topic: Threshold FET 10e and 10pe - phono and line stages
Replies: 8
Views: 5550

Re: Threshold FET 10e and 10pe - phono and line stages

Here is a quick update on the change to the sound of the 10e after installation of the stepped attenuators. Past experience has taught me that the sound of a modified piece of equipment can change quite a bit over the first week or so, so consider this an interim report. I find that there is a grea...
by garyb
Mon 7 Nov 2011 15:08
Forum: High-end preamplifiers
Topic: Threshold FET 10e and 10pe - phono and line stages
Replies: 8
Views: 5550

Re: Threshold FET 10e and 10pe - phono and line stages

Here is a quick update on the change to the sound of the 10e after installation of the stepped attenuators. Past experience has taught me that the sound of a modified piece of equipment can change quite a bit over the first week or so, so consider this an interim report. I find that there is a great...
by garyb
Sat 5 Nov 2011 22:30
Forum: High-end preamplifiers
Topic: Threshold FET 10e and 10pe - phono and line stages
Replies: 8
Views: 5550

Re: Threshold FET 10e and 10pe - phono and line stages

After upgrading the power supply, I did some comparisons between the 10/e and a passive volume control using optocouplers. While I preferred the sound of the Threshold overall, there was no denying that the Threshold smoothed things over a bit and lost a bit of detail. My conclusion was that the bal...
by garyb
Sat 5 Nov 2011 21:56
Forum: High-end preamplifiers
Topic: Threshold FET 10e and 10pe - phono and line stages
Replies: 8
Views: 5550

Re: Threshold FET 10e and 10pe - phono and line stages

This is still a work in progress, so I will continue updating this thread as more changes are made. OK, I've made more progress on upgrading my FET 10/e and I'm slowly getting it closer to the competition grade upgrade that has been discussed earlier on this site. Back in September, I experimented ...
by garyb
Sat 29 Oct 2011 17:01
Forum: High-end preamplifiers
Topic: Fet 10e and phono stage
Replies: 3
Views: 2611

Re: Fet 10e and phono stage

DaveThreshold wrote:Do you still have them? I am hoping you will get back to me either way.


I'm not rab, but I know that he doesn't have them anymore since I bought them.

---Gary
by garyb
Sat 30 Jul 2011 20:18
Forum: High-end preamplifiers
Topic: Threshold FET 10e and 10pe - phono and line stages
Replies: 8
Views: 5550

Re: Threshold FET 10e and 10pe - phono and line stages

This is still a work in progress, so I will continue updating this thread as more changes are made. The next step is to try a better quality power supply on the line stage and see how that affects the sound. The voltages of the 10he line stage and the 10hl line stage are the same, so I will patch th...

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