[S Clark]

I've been trying to contact George Kaye with no success.  Anyone know of a tech that can fix a hum issue on an old Moscode 300?

[bahorn1]

I was able to reach George recently at moscode@att.net.  Good luck.

[audiobasic2000]

Good Morning,  S. Clark:

   Yes, I agree with bahorn1. George is reachable at the e-mail address noted. He just may not respond right away but he does respond - so keep that in mind. By the way, if it's a mechanical hum rather than one that one can hear through loudspeakers, then there may not be much that can be done unless George has some replacement transformers that do not hum.  Note: My Moscode 300 has a mechanical hum and it is my understanding that it was one of the occurrences in these units/amps. George was very nice in responding but will not likely divulge schematics/parts lists or supply parts that are not listed on their website. I'm  located in Canada so any parts replacements/unit refurbishment is a bit too cost prohibitive especially at the current exchange rate. Thanks and hope you get the answers/result you are looking for.   

Sincerely,
Kingsley.

[arthurs]

I would try Frank Mufich in McKinney.  If you're coming out for LSAF he's right in the neighborhood. He is a really good guy, doesn't need a schematic, is reasonably priced and does incredible work. Guy is a genius with a circuit.  Highly recommend. http://www.mufichaudio.com/

[S Clark]

Thanks guys.  This is valuable info. 

[thunderbrick]

Mike Missel in St Louis takes very good care of my 300.  He's on AC as mjmsound.   

Great guy!   

[bahorn1]

I've been trying to contact George Kaye with no success.  Anyone know of a tech that can fix a hum issue on an old Moscode 300?

Please let me know what you find out.  I have a Moscode 401HR.  It's been out of my system.  But I plugged it in recently and now hear transformer hum.  I bought a HumDinger from Audio by Van Alstine.  I haven't had a chance yet to put the Moscode back into my system with the HumDinger to see if that resolved my hum issue.  This all happened after I emailed George last month.  BTW, George did respond to my question pretty quickly.

[S Clark]

After two voice messages and three emails over a period of a just over a week, I'm wonder how active George is at this time.  I've sent a message to the fellow that Art suggested in McKinney, TX.  Also found another fellow searching for "Moscode repair" that is supposedly good but expensive.  I'll let you know what I find out. 
Shame about your 401HR.  That's my main amp, and the 300 is a backup unit.  I also see you have a McCormack.  I had narrowed my choice down to Moscode or McCormack when a used 401 became available.  Interesting coincidence.

[sturgus]

I would also give John Hillig at Musical Design a call. I know that he has worked on the Moscode amps . He also has worked with George Kaye on a few projects. It's worth a shot.
Musicalconcepts.com

[S Clark]

I would also give John Hillig at Musical Design a call. I know that he has worked on the Moscode amps . He also has worked with George Kaye on a few projects. It's worth a shot.
Musicalconcepts.com

Thanks.  I finally got an email back from George an hour or so ago.  He's alive and working, and swamped.  I've got my name in on a couple of month backlog.  Fortunately, this is an extra amp, so a delay is not a real issue.  There is also an option within driving distance I'm waiting to hear from in the Dallas area. 

[bahorn1]

After two voice messages and three emails over a period of a just over a week, I'm wonder how active George is at this time.  I've sent a message to the fellow that Art suggested in McKinney, TX.  Also found another fellow searching for "Moscode repair" that is supposedly good but expensive.  I'll let you know what I find out. 
Shame about your 401HR.  That's my main amp, and the 300 is a backup unit.  I also see you have a McCormack.  I had narrowed my choice down to Moscode or McCormack when a used 401 became available.  Interesting coincidence.

Interesting.  Yes, I bought the McCormack 225 I think back in 2008.  I went through a case of upgradeitis at that time, read a lot about the 401HR since it was pretty popular back then, and then bought one when one came up used.  The 401HR was my main amp until about a year and a half ago.  I was having problems with the left channel making a terrible noise.  Rather than send it to George, I took it locally for repairs.  I guess it wasn't a big fix because the guy didn't even charge me.  I recently bought a Hegel H160.  That's why I haven't gotten around to putting the 401HR back into my system to figure out the transformer hum issue.  I bought all of these amps used.  I guess I should try to sell at least one.

I got your PM and see that you did hear back from George.  Glad you heard back.  But it's too bad he's backed up. I hope you eventually get your hum issue fixed.

[dB Cooper]

The VanAlstine HumDinger, mentioned earlier in this thread, might be worth a try, especially compared to a two-month wait, and probably costs about the same as two-way shipping of a big power amp. If you give AVA a call, they might be able to help figure out if that option holds hope of success. I once had an AVA amp with a mechanical buzz and the problem persisted after a transformer replacement. Apparently toroid transformers can make noise when DC is present on the power line. Might also be worth trying the amp elsewhere to see if the problem persists.

[S Clark]

In my case, hum is all the amp does- no music.  Of course a humdinger could create complete silence, but it's cheaper to simply unplug it.

[dB Cooper]

Aha. It certainly won't cure that. Sorry, I should have paid attention a lot more closely.

[S Clark]

Aha. It certainly won't cure that. Sorry, I should have paid attention a lot more closely.

No problem, I hadn't described the issues before, so your suggestions were appropriate.