Search found 27 matches

by mikefc
Tue Apr 26, 2022 4:38 pm
Forum: General Solid State Audio Discussion
Topic: Marantz 2230 STUMPED
Replies: 0
Views: 551

Marantz 2230 STUMPED

I decided to take a break and reach out for help here at AK. Sometimes when you get in a rabbit hole of troubleshooting you can really become blind, a new perspective would be greatly appreciated. I am repairing an old Marantz 2230, it was in bad shape with many issues, all of which are taken care o...
by mikefc
Sat Jul 24, 2021 12:53 pm
Forum: General Solid State Audio Discussion
Topic: RightMark Audio tests
Replies: 1
Views: 853

RightMark Audio tests

Has anyone used the RMAA software with a Behringer UCA222 ? I'm not sure what attenuation to use when connecting to amplifier outputs. The 222 has a 27k input impedance I believe.
by mikefc
Mon May 03, 2021 12:49 am
Forum: General Solid State Audio Discussion
Topic: Marantz SR4000 repair
Replies: 13
Views: 3520

Re: Marantz SR4000 repair

Do you know if I can replace the MK II with these ?

Thanks for the link. I have a search saved but it missed these.
by mikefc
Sun May 02, 2021 5:21 pm
Forum: General Solid State Audio Discussion
Topic: Marantz SR4000 repair
Replies: 13
Views: 3520

Re: Marantz SR4000 repair

Hugo wrote: Sun May 02, 2021 5:18 pm I will be blunt with you, I hope you don't mind:

"You are asking for gold dust"
i don't mind at all.... LOL

Michael
( pan handler)
by mikefc
Sat May 01, 2021 12:13 pm
Forum: General Solid State Audio Discussion
Topic: Heathkit restoration
Replies: 0
Views: 690

Heathkit restoration

I'm deep into the referb of these two beauties. IMG_0934.jpeg AM works great FM does not, complete manual on it's way so I'll wait for that. The amp is working but the left channel has a fair amount of low volume distortion, like pink noise. Is it more likely that the germanium transistors are causi...
by mikefc
Sat May 01, 2021 12:01 pm
Forum: General Solid State Audio Discussion
Topic: Marantz SR4000 repair
Replies: 13
Views: 3520

Re: Marantz SR4000 repair

bump

refund complete...

still looking for STK0050 MK-II , anyone have a donor?
by mikefc
Wed Apr 21, 2021 9:48 pm
Forum: General Tube Audio Based Discussion
Topic: Basic Grounding
Replies: 31
Views: 7112

Re: Basic Grounding

Kappclark wrote: Wed Apr 21, 2021 9:45 pm I enjoy the thread ... the term grounding implies Earth and dirt... which is what I used to think of as the only "ground" , until someone asked me how grounding worked on an airplane ... ha ha..
if the weather is bad enough though, planes will be grounded :lol:
by mikefc
Wed Apr 21, 2021 5:49 pm
Forum: General Solid State Audio Discussion
Topic: need Sanyo STK0050-MK-II darlington amp
Replies: 3
Views: 1275

need Sanyo STK0050-MK-II darlington amp

I'm restoring a Marantz SR-4000 for a friend. If anyone has a working STK0050-II I'll buy it. I'd rather install an old device from a donor receiver than the knock-offs you get on the auction site. I just returned two for a refund, they distorted at medium volume. Total crap.

Thanks
Michael
by mikefc
Mon Apr 19, 2021 11:19 am
Forum: General Solid State Audio Discussion
Topic: Realistic SA-2000 integrated
Replies: 5
Views: 1618

Re: Realistic SA-2000 integrated

this looks very promising.... thank you
by mikefc
Sun Apr 18, 2021 11:25 am
Forum: General Solid State Audio Discussion
Topic: Realistic SA-2000 integrated
Replies: 5
Views: 1618

Re: Realistic SA-2000 integrated

thx, i looked closely but could not find any 250k/Bx2. the Bx2 is important, it has the dual faders inside. Each slider ( left and right ) is itself a dual volume control. It looks like ( on the schematic ) there is volume control before and after the "perfect volume" feature. In the end I...