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I'm building a couple of the UGS Muse preamps from the french site homecinema.fr / diyaudio. The only part done on both of the is the processor boards, and yes, it was easy to flash. These do use the 72323 chips (which I haven't bought yet).

Any experience with the Muses volume controller IC in place of clacking relays?

Any of you watching the new series on Apple TV, Slow Horses? Gary Oldman stars, about a slow witted bunch of MI5 agents in Britain. Pretty good. I think the first 3 episodes are out now. We finished watching the Night Manager and enjoyed that. Though we (my wife) loves Hugh Laurie (House).

Bought a restored Thorens TD320 Mk ii from a shop in Denmark. I liked my original Mk i, but wanted the better arm. I'm installing a Grace F9e with SS stylus on it. Might not be the best match, but will see.

Happy Birthday Tyler! Ditto on a safe one!

Happy Birthday Doug!

I actually got them from ebay. I think Kevin had posted a link in one of the threads, probably the Dynalo thread. Ebay isn't showing me who or what these are (only goes back to 2020 purchases). I'll keep looking. EDIT: it was something like these: https://www.ebay.com/itm/254636284745?hash=item3b49815b49:g:CGIAAOSw8s1gnfky

Looks nice. Interesting chassis! I've been using the same Wago connectors as well (2- and 3-way). They're pretty slick and apparently are good up to 450V.

^ Thanks! I figured it might be something from Mill-Max, but hard to go thru all their stuff.

Nice! A couple of questions: How do you guys cut the angle brackets so nice and clean? What are those test point pins used in the boards? Do you have a part number/source? Thanks!

Wow, no shit. Hard to believe. RIP Taylor.

Sorry for your losses Bryan. My condolences to you and your family.

What a fucking douchebag. They probably have (a bunch of) video on him. Persecuted? How about being held accountable for your actions?

^ Agreed. Watched the 1st two episodes tonight.

Nearly finished casing my Salas phono stage. Need to mount the transformer and raw PSU. I may use a vandal switch on the front, but some type of momentary switch board or at a minimum, a voltage select board will be going in as well. Also need to shorten transformer leads, and clean up wiring. Runs dead quiet in my system; no noise evident when turned up all the way at tweeters or via headphones. I've got the Antek steel transformer cover and a set of Mundorf Supreme caps, though the kids all seem to be going for the Clarity Caps these days. It sounds good with the BC polyprop and MKP1837 I have in there now. This is setup for MM at 42dB gain. Loading switchable to several different values via dip switches. Set at ~34K right now for the Ortofon 2M Bronze I was using (a bright cartridge IMO).

Happy Birthday Al! I hope the drive is good and you have a great one!

R1 is 4.7K (Soren said 4.5K in his text). Regarding the low voltage test, for the GRHV, the gain is calculated similarly to the GRLV? i.e., ((Ra / Rb) + 1) * Vref, so for this one set for 400V, it would be (((390K + 390K) / 20K) + 1) * 10, or 40 * 10? If I did something like parallel one of the 390K with 1K, I would get ~205V. Using an Antek AS-3T325, the GRHV should regulate at about 75Vac input (325/115 turns ratio)? Just making sure I'm understanding the concept. Or would you go even lower for this test? James recommended ~50V output for this. EDIT: If I parallel 100K across the 2x390K that would give me about 55V output. I'll probably do that instead. goldenreferencehvsic.PDF

OK, ran thru this on both boards: Initial check: The CCS's Use a lab supply at some ~15-20V, through a DMM at mA: put the (+) at the drain (middle leg) of the 10m90, and the (-) at the bottom of the CSS where R2(100) and R1(4k5) meets ...you should get ~2mA ....if you see much more, try replace the DN2540. Do the same at the other CSS: (+) to drain (middle leg) at the 10m90, and (-) at the bottom (pin 6 at the voltage reference) ...you should get ~1.3mA ...if not the 10m90 is probably damaged. Check the current limiting CSS you added (your drawing) the same way (Kevin suggested 50mA for this) For the first test, I was getting 1.6-1.7mA for both boards. 2nd test I was getting -1.3mA with the red lead on the 10m90 and black on lt1021 pin 6. I guess I will assume everything good so far...

Thanks James (and John). I was going to go thru the checks that soren laid out in the circlotron thread (and I copied his post earlier in this thread), and then power them up on a variac, unloaded. It might have been a 16K resistor that Kevin had mentioned, but I never bought any load resistors for doing this. Unfortunately my variac doesn't have an ammeter in it, but I'll just take it slow. I also don't have a dim bulb tester, but if needed, might build one.

About to (finally) begin testing the pair of GRHVs (and a Carbon) I built. Do I need any sort of load for testing the power supplies? I seem to recall seeing Kevin recommend a 16ohm x W load resistor.

No shit. Seems mighty Christian of him..."Nuke em all til they glow..."

Here they are. THAT340-J109-K389-JFET.zip

Kevin, The pinout of the bipolars is not compatible with the 2sj109/2sk389. I did boards for those and can supply the gerbers. They should also be in one of the dynalo, etc. group buys that Steve ran (sbeylo) some time ago.

Happy Birthday Fitz!

Happy Birthday Nate!!