avionic

Hi I was looking through an old thread from 2011 where you recommended replacing some transistors in a HK730, sadly the KSC1845EBU that replaces a 2sc1400 are no longer available. Any chance you know of a newer equivalent? I know these need to be hfe matched. I'm restoring a hk730 and just returning to electronics as a hobby after a 35 year break.

Wonder what ol Bill is up to these days.

"Keep it pithy! No bloviating!" LOL :)

Hello Dave, considering a Yamaha CR2020 purchase and thinking about have it sent to you instead of me for service bulletin updates and a general check over...are you up for that? I haven't purchased it yet but working on it...the owner doesn't know if the work has been done so I must assume it has not.
Thanks
Russ

I very seldom open this page. So PMing me will get a quicker response.

will the following trim pots work on a yamaha m4 and 85, to set bias: Total Resistance Tolerance: +/-20
Rating Power: 0.10 (W)
Max Operating Voltage: 50(V)

Hi, I have a Yamaha C6 Preamp starting to hum, checked cables, solder cracks and caps, still hums. I think some 37 year old caps need replacement what brand and series would you advise? I like Nichicon but will take your advice, you know Yamahas.
Thank you
Mike

Hi Looking for some help with a yamaha ca-800 . Bought on CL. Worked fine in normal mode but left channel is super low volume in class a. I opened it and used deoxit to clean switches and pots (volume was scratchy and inside was really dirty). Now the left channel is out for normal and class a (although if I crank the volume you can hear a little yet distorted sound)
Any ideas would be appreciated!

yamaha tech

Don't know if you got my PM or not.. :)

Very nice of you to hang in with Bluhn321.

Jeff

I have two MA5002 amps and a DX4000 and SP4002 preamps. Is it possible use both amps with one of these preamps in bridged mode without any further equipment?
Thanks!

Hello, stoutblock recommended you for refurb of my C4. Do u have set prices on certain services? What do u usually recommend on these units?

Hi Avionic , My name is Carlo I've had my CA-1000 since 1978 it died eventually in 1990
was told at the time it couldn't be repaired but I didn't believe them, just recently I came across this site and you , I would like to bring the CA-1000 back to life but only to be used as a pre-amplifier with one my AX-592 amps I feel the AX-592 have an inferior quality pre-amp section , my question to you is this what is the one part in the CA-1000 that would make re-birthing pointless , the transformers maybe? I hope my question makes sense , I am willing to spend around $600 to re-birth it.

avionic, I am wondering what your availability/interest would be this summer to rework one of my HK 330b's. Both are starting to get soft transistor hiss. Do you work on HKs as well as Yamahas? What would a ballpark range be for the problem transistor + cap replacements? These are my oldest pieces of equipment, but I really do like the sound of them. Thanks for any thoughts... Joe Smith, Des Moines

Thank you SO MUCH for the reply regarding the loose wire in C-4...amazingly generous of you!

I thought that might have been it, but how do it get it to stay in the hole? I can do very BASIC soldering...is that necessary?

Also, do you think this wire being loose would create the problems I described? (strange output on L/R - Treble/bass - on the phono stage?)

Thanks AGAIN!

are you familiar with sansui b-2101

I am having issues with no relay click and no signal on my cr-800. Any suggestions?

I'm have questions regarding a Yamaha CA2010 amp. First, are the switches for the input selector, etc open enough to be easily sprayed with deoxIT and second do you have to only remove the wooden cover to get to them. Thanks, Bob. A direct email is robertwhouston@yahoo.com

I might look at this page once or twice a month--Send a PM and you'll get a quicker response!