Discussion in 'Fisher' started by Patrick_W, Nov 25, 2017.
If you click upload a file, you'll get a list of accepted attachments
Got it. No mp3s.
I will upload something to youtube or soundcloud later on and post the link.
No man, I only mess up my own stuff
@MannyE - In NYC, we expect our tube repairs to be delivered, with a side of sashimi.
If you liked Cosmophonic Sound, I'm thinking that that might be your best bet. Heck, you're out on Long island already really, being in Brooklyn. Also, navigating there is easier than going up to Connecticut or out to Jersey. By the way, I hope you're enjoying the Wharfedales. And I hope that the 800B worked out forTom B.
George; You're just a glutton for your own Punishment!
Of course because I have not tried the amplifier for over a month, now that I plug it in the "thwack, thwack" is not happening. However, my right channel had a healthy level of crackling and static but that has slowly diminished in intensity over the last hour.
Hmmmmm. Very curious....
But I don't suppose anyone wants to hear a recording of static. I think it was the uniqueness of the "thwack" sound that people wanted. Right?
Hey Gannon, right you are about Brooklyn being the tip of Long Island. Now if only getting to all the fun stuff did not mean the LIE...
And I am loving those Wharefedales. I got them for the tubes and they sound sweet. And I threw a coat of oil on them and they look gorgeous now. Thanks!
That "thwack" or rapid "tock, tock, tock" may be what's called motorboating, a symptom of a dead/dying cap or a grounding issue. That's why I wanted to hear it. If you now have diminishing static, I'll bet it's a tube arching in its socket or just a bad tube. With the unit playing, see if you could see a tube flickering. If so, clean the socket and see if that cures it. If not switch the tube elsewhere to see if it acts up in another position. If so, you found your problem.
Larry, I told myself I'm DONE! D-O-N-E! Yesterday, what did I go and do? Stopped in to Sal's Army on my way to see my dad, saw a NAD 7225PE just sitting there, plugged it in and the front panel lit up, stuck it under my arm and for $22 I walked out. Just like a freakin' thoughtless robot! But, seriously, I'm done! I'm going to finish up the 500-C, the CX-2, and this NAD and dats it. I'm going to shift gears into building some cases to get rid of some material I've accumulated; then it'll be spring and I mo concentrate on fishing.
That's great, Patrick. You know, I looked up Cosmophonic Sound and it seems that it might be located in Rosalyn, and that's not too far out of the city. Take the BQE to the LIE and you're there very quickly. I think Rosalyn is around exit 37. It's in the 30s for sure, in Nassau County. It might even be easier to take it to a place like that instead of lugging the amp around Manhattan. Just put it in the car, and less time carrying it on the street. Also, no expensive parking garages. It's good for me to know about, in that I am on Long Island, myself.
Hi George. Thanks for the info. I did shoot a short video on the phone which I will post when I get a chance. I can see the V10 tube flickering as I turn up the volume. The static comes from the right channel only and it and the flickering start as I turn up the volume past 5 and continues until I turn it down again. I did switch the tubes around and even tried a newer EH tube, but no luck in solving it. I will try the cleaning of the socket.
Stay tuned for the film...
If any tube flickers in that socket then it is the socket or related components. Fisher resistors generally are very stable except for the carbon comps. If it is not tube, or a dirty socket, then check underneath for a bad resistor or cap. I'll tend to think that it is not a solder joint gone bad given the fact that you say the condition improves over time.
I don't have a schematic so is V-10 a right channel tube?
Here is the video.
I turn up the volume and the flickering and static increase. I turn it down and it decreases. The V-10 tube is the right channel tube.
K, quick question: when it's acting up like that do you have music when you're passing a signal? I understand that you have static but are you getting music notwithstanding the static? Also, have you checked the guts of the unit, particularly the components attached to V-10? Before you go any further, clean the socket first and try again. If you're comfortable flip it over and open er up; take a good pic of the underside of V-10.
BTW: I'm pretty sure this is an easy fix.
The sound will play, I can get music notwithstanding the static. I just posted it with no signal going through to demonstrate the static. In quiet passages of music you can hear the static, less so on louder passages. However it was VERY obvious before when I was having the cycling "thwack" sound. You could play music through both channels but it was hard to hear over the "thwack."
I hope it is an easy fix. Unfortunately I am gone for the holiday, on to snowy Vermont while the KX100 is back in NYC. I will update you on the progress when I am back in NYC after I clean the socket and open it up and share a photo.
In the meantime, if you have insights I am happy to hear. George, your knowledge and wisdom is much appreciated. I am truly grateful for the time you take to weigh in.
And to all who reply to my inquiries, thanks again. The shared wisdom and camaraderie is what makes this forum so valuable, I appreciate it. Happy Holidays to all.
I'm actually glad there is some distance between you and the Fisher. Now I don't have to "hear it" as I run between AK, last minute holiday prep, and my own diversions. So, no worries. I'm pretty confident this is an easy one.
Enjoy the snow!
I've had some recent NYC experience with my 500c.
First, I would NOT recommend taking anything to a place called SG Custom Sound in Queens. Without getting into details, that dude doesn't seem to know anything about working on Fishers- he screwed up my power supply when he replaced a bunch of caps to fix a little hum that had developed. He also incorrectly biased the NOS Sylvanias I had him install.
I've used Blackie for my guitar amps for years and he's great... but I've never taken him any hifi equipment.
I can vouch for "captailfantastic" in Brooklyn. He's the guy I originally bought my 500c from. He's pricey, but he knows his stuff. I took my 500c to him after the other guy screwed it up. He offers a "full restoration service" on eBay for $500, but I think that's kind of overkill. He "upgraded" some coupling caps for me, but I found that I preferred the sound of the original ones (especially in the phono section), so I put them back in. He got my Fisher working great again. Put in adjustable bias too. And fast turnaround. I should have taken it back to him in the first place. PM me if you want his number.
Thanks keith. I spoke to "the captain" once actually, but never kept his number. Would you mind passing it along?
Out of curiosity, if he sold you the 500C to begin with, why did you decide to use the guy in queens for the repair?
My 500c sounded magical when I got it. It came with Electro Harmonix 7591's and one of them went bad after about a year and a half of playing about 3-4 hours daily. So I tracked down a matched quad of NOS Sylvanias, figuring that the extra expense was worth the increased reliability. My Fisher also still had the original can caps and I knew I should have them replaced just to be on the safe side. I live in Queens and it was just more convenient to take it to the dude in Queens because traveling anywhere in this city (even without carting a 50lb stereo) can be a nightmare.
I spoke to the Queens guy before I took it in and it seemed like a pretty simple procedure to do. He replaced all the electrolytics and "installed" my Sylvanias. When I got it back, it sounded very flat & sterile and I had to turn the volume pot up a lot higher to get the same level as before. I took it back to him and told him it just didn't sound right. He admitted that he "hadn't done any critical listening" when he installed my new power tubes. I mentioned that the Sylvanias should be running ~34mA. It turns out that he didn't even re-bias when he installed them. So I got it back and I knew it still didn't sound right.
So I took it back to "captainfantastic" and he said the power supply was wired wrong. He got it back to me in less than a week and the magic was back.
The whole experience was really frustrating and expensive. The silver lining is that it pushed me to learn how my own equipment works and how to troubleshoot/repair it. I watched a ton of electronics tutorials/schematic reading/tube circuit theory videos on youtube, and got a better soldering iron & multimeter. And of course AK has taught me a million things, and I'm super grateful to be able to learn from other's experience and expertise! So thank you!
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