News:
December 01, 2023, 02:17:48 AM

Recent Posts

Pages: [1] 2 3 ... 10
1
Eros Phono / Re: Cartridge advice
« Last post by Hank Murrow on Yesterday at 01:16:07 PM »
I am using the Eros Phono preamp with the Hana SH cartridge into my custom Soul Sister preamp and Kaiju amp. It is a lovely sound that I am enjoying with my collection of 1500 mostly pristine discs. I have a set of Altec low-output transformers, but have not needed these with the Hana SH, as the Eros circuit provides enough gain, and the MQ cobalt B-7 outputs on the Soul Sister really give all the detail anyone might want from their vinyl collection within this amplification chain. The Shibata stylus rides in unworn regions of the vinyl groove, yielding a very quiet presentation.

Cheers to BH and PB! Hank in Eugene
2
Eros Phono / Re: Odd problem playing LPs
« Last post by Larpy on Yesterday at 09:10:21 AM »
Some success!  I fixed the regulated B+ problem.  I now have 218v coming to both sides of the C socket board.  Kreg on the D socket board is 5.9v on both sides.

The problem turned out to be the 431 regulator.  The only reason I figured this out is because as I was reflowing the solder on the kreg wires between the socket and the board I had a feeling of déja vu.  I checked the Eros forum archives and, sure enough, almost 2 years ago I had the exact same issue playing LPs through my Eros ("sounds like a dirty stylus," I moped) and you eventually helped me diagnose the problem as the 431 regulator.  Then it was the B side; this time it was the A side. I still had extra 431s from fixing the problem then.  Since the legs of the "bad" regulator didn't seem to be shorted, I guess the problem was a questionable soldering job that took a few years to become a problem.

Once I get some more 2N2222s delivered next week and replace the shorted one on the C board, maybe I'll have a happy Eros again.

Thank you again for your help and amazing patience.

To be continued. . . .
3
Paramount / Re: Blown mje350 and led [REPAIR VID AT END] [resolved]
« Last post by Rob Capizzi on Yesterday at 07:25:05 AM »
Thank you
4
Paramount / Re: Blown mje350 and led [REPAIR VID AT END] [resolved]
« Last post by Paul Birkeland on Yesterday at 07:23:30 AM »
Yes, you are correct.  For whatever reason, I remembered the higher current/voltage side of the Paramount C4S being the A side (a convention which we did adopt at some point), but it appears that the B side is where you want the 5731As.  Such things happen on a product that hasn't been around in a while!
5
Paramount / Re: Blown mje350 and led [REPAIR VID AT END] [resolved]
« Last post by Rob Capizzi on Yesterday at 07:00:17 AM »
So then I'll leave alone side A in paramount, but upgrade side B in foreplay center board?
6
Paramount / Re: Blown mje350 and led [REPAIR VID AT END] [resolved]
« Last post by Paul Birkeland on Yesterday at 06:53:01 AM »
You can do that in the Paramount.  I personally don't find it worth the risk of damaging a PC board that we don't produce anymore to do this, but it's certainly an option.
7
Paramount / Re: Blown mje350 and led [REPAIR VID AT END] [resolved]
« Last post by Rob Capizzi on Yesterday at 06:45:55 AM »
how about the B side? I've installed the MJE5731a. On the B side. Can I put mje5731AG on both A and B?
8
Stereomour II / Re: Stereomour II 3.3uf caps(upgrade)
« Last post by DPetrini on Yesterday at 06:45:10 AM »
Big thank you!
9
Eros Phono / Re: Odd problem playing LPs
« Last post by Paul Birkeland on Yesterday at 06:28:34 AM »
KregA on the D socket board measures 24v (A side output is 294v).
One of the resistors from grid to ground (pins 2/7) on that 12AU7 isn't doing its job.
I checked for continuity among the legs of all 6 transistors on the C socket board (above the 6922/7308) and there's no continuity except for the 2N2222 on the left channel side of the board.  That means this one needs to be replaced, correct?
Yes, that is definitely causing one of your issues.
10
Paramount / Re: Blown mje350 and led [REPAIR VID AT END] [resolved]
« Last post by Paul Birkeland on Yesterday at 06:27:33 AM »
You want the 5731A on the A side where it's exposed to more voltage and cooks off a little more heat (in the Paramount).  In the Foreplay, the center board just gets a little warmer than the outer boards and the 5731A will more gracefully handle the load in that position.
Pages: [1] 2 3 ... 10