So, what music are you listening to now?

[icenine]

I will go with .1uf for the coupling caps.....the K409 s and what sort of preamp are you using with yours? I think maybe I will buy one of those Chinese Music Angels....American tube preamps are $$$$

[hillbilly]

Stereo is out for dusting so no music till I lug the heavy thing back in here. All I hear is ringing in my ears when there is what should be silence. Part of growing old.

[bobabode]

Originally Posted by icenine

You mean the death caps? no...nothing....I just did your balance pot removal and installed speaker jacks....I don't have a switch yet so I am using a wire screw with the power wires shorted...hooked to a power strip. The only issue is some bass lower end distortion on one of the channels but it could be the EQ on the Kenwood pre doing it I adjusted it and it is gone.....

this thing sounds great even with the Kenny solid state...Thanks for all your help Bob!

The power supply caps are those in the big silver can topside. Electrolytics. Those definitely need replacing, the electrolytic paste inside of those are dried out after fifty years. They will work but if one shorts it'll take out your output transformers. The easiest way to do it is to mount separate electrolytic capacitors underneath. I had tremendous and patient help from GordonW and a few others over at AK and the least I can do is help out with my little bit of hardwon knowledge. The hardest thing was teaching myself how to read the schematics, luckily those 175s are well documented in the SAMS literature.


The death cap thing is easily handled by replacing it with an x1/y2safety cap. Those will short open if there's a failure in the power supply caps.
Don't worry about it if this all sounds like gobblety gook, a few years ago I would've gone crosseyed after the first three previous sentences. I've rebuilt a few of those amp175s before I stumbled on to my present rig of two amp150 monoblocks.

[bobabode]

Originally Posted by hillbilly

Stereo is out for dusting so no music till I lug the heavy thing back in here. All I hear is ringing in my ears when there is what should be silence. Part of growing old.

Ouch, tinnitis is something I haven't had to deal with. Kind of amazing considering the amount of nail/staple gun hours I've put on these tired old ears. Not to mention swingin'a 28 oz. ripclaw or a 16oz. Plumb roofing axe. Hope you get some tunes up and running soon, it's the only thing that keeps me sane!
What have you got?

[bobabode]

Originally Posted by icenine

I will go with .1uf for the coupling caps.....the K409 s and what sort of preamp are you using with yours? I think maybe I will buy one of those Chinese Music Angels....American tube preamps are $$$$

Go with 1.5s. I don't own a tube pre amp. I've used my Marantz 2270 preamp section which is easy with that one, just remove the jumper. Right now I'm using the soundcard (M-Audio Audiophile 192) PCIe slot in my computer (homebrew Asus motherboard tower job). It does the job pretty well.

[bobabode]

The Very Best~Cream

[icenine]

Originally Posted by bobabode

The power supply caps are those in the big silver can topside. Electrolytics. Those definitely need replacing, the electrolytic paste inside of those are dried out after fifty years. They will work but if one shorts it'll take out your output transformers. The easiest way to do it is to mount separate electrolytic capacitors underneath. I had tremendous and patient help from GordonW and a few others over at AK and the least I can do is help out with my little bit of hardwon knowledge. The hardest thing was teaching myself how to read the schematics, luckily those 175s are well documented in the SAMS literature.


The death cap thing is easily handled by replacing it with an x1/y2safety cap. Those will short open if there's a failure in the power supply caps.
Don't worry about it if this all sounds like gobblety gook, a few years ago I would've gone crosseyed after the first three previous sentences. I've rebuilt a few of those amp175s before I stumbled on to my present rig of two amp150 monoblocks.

I can most likely by a big value cap and place it underside the cans...just switch the wiring right? I will do that next does not sound to hard to do....
thanks
Leroy

[bobabode]

Originally Posted by icenine

I can most likely by a big value cap and place it underside the cans...just switch the wiring right? I will do that next does not sound to hard to do....
thanks
Leroy

Yep, that can cap topside has four electrolytic capacitors stuffed in it. Which rectifier tube is in your amp? 5U4GB?

[icenine]

Originally Posted by bobabode

Yep, that can cap topside has four electrolytic capacitors stuffed in it. Which rectifier tube is in your amp? 5U4GB?

two 5yg3t....will buy some new ones...maybe even buy some new 6v6s too they are not too expensive....

[BlueStreak]

I'm listening to the sound of my sisters ancient dog wandering in circles, bumping into things and whining. Blind as a bat and deaf as a stump. It's time, but she won't hear of it.

GAW!

Dave