audiodon
Addicted Member
Jim McShane has suitable replacements. Send him an email and he'll set you up with the right stuff.
http://pages.prodigy.net/jimmcshane/
http://pages.prodigy.net/jimmcshane/
Recapping Fisher X19 amp and FM19 tuner
- Thread starter rcflybob
- Start date
rcflybob
Member
WOOHOO Amp Recap done
Well its been a little while but I finished restuffing the two lytic caps on the top of the amp.
I started with the single section cardboard covered cap first, as that looked like the easiest to remove, which it was. :yes: I had intended to uncrimp the base to open it up but after jabbing myself twice with a small screwdriver :tears:, I decided to get the dremmel tool out and open the can that way. I wasn't expecting the insides to be as dry and corroaded as they were, they literally just fell out of the can.:yes: Next I cleaned the base up a bit and drilled two small holes for the new leads to go through, and connected them to the proper spots. Positive lead to the large terminal, and the ground lead to one of the base twist-locks, making sure to be careful with the solder since this can has an isolated ground.:yes:
Pics on the process below, this actually turned out to be the easiest part of the recap process. Next, tackling the large multi-section cap. This one turned out to be the evil twin.
Well its been a little while but I finished restuffing the two lytic caps on the top of the amp.
I started with the single section cardboard covered cap first, as that looked like the easiest to remove, which it was. :yes: I had intended to uncrimp the base to open it up but after jabbing myself twice with a small screwdriver :tears:, I decided to get the dremmel tool out and open the can that way. I wasn't expecting the insides to be as dry and corroaded as they were, they literally just fell out of the can.:yes: Next I cleaned the base up a bit and drilled two small holes for the new leads to go through, and connected them to the proper spots. Positive lead to the large terminal, and the ground lead to one of the base twist-locks, making sure to be careful with the solder since this can has an isolated ground.:yes:Pics on the process below, this actually turned out to be the easiest part of the recap process. Next, tackling the large multi-section cap. This one turned out to be the evil twin.
Attachments
rcflybob
Member
The next job was to go after the multi-section cap. My intent was to remove this one from the chassis completely like I did with the first cap, and clean it up, restuff it and then re-mount it.:yes: Unfortunately Murphy's law came into play and I could not get the can loose from the chassis.
Upon further inspection I found that the factory had done such a good job of insuring the can was grounded to the chassis with solder, that the solder had worked its way between the top of the chassis and the bottom of the can, and I could not melt it enough to get the can free. At this point I covered the rest of the amp and used the dremmel VERY CAREFULLY to cut open the can while it was still mounted to the chassis. The insides of this cap were just as bad, and came out very easily. I wanted to restuff the cap with all four new caps, but I goofed on the dimensions and could only fit three caps inside.:yes: I decided to leave out the 100 microfarad 250v cap that connected to the single section cardboard cap and mount that one under the chassis. This allowed me to just put the other three caps inside the can. I then started to hook all the wires back up to their proper terminals, soldered in the new carbon comp. resisters and installed the new diodes that I got from Jim McShane. I also wound up replacing two wires, the white wire on the single section, and the purple wire on the multi-section cap with new teflon coated wire that I also got from Jim. The original wires condition were suspect so I decided to change them out.:thmbsp:
Next installment: the startup
Upon further inspection I found that the factory had done such a good job of insuring the can was grounded to the chassis with solder, that the solder had worked its way between the top of the chassis and the bottom of the can, and I could not melt it enough to get the can free. At this point I covered the rest of the amp and used the dremmel VERY CAREFULLY to cut open the can while it was still mounted to the chassis. The insides of this cap were just as bad, and came out very easily. I wanted to restuff the cap with all four new caps, but I goofed on the dimensions and could only fit three caps inside.:yes: I decided to leave out the 100 microfarad 250v cap that connected to the single section cardboard cap and mount that one under the chassis. This allowed me to just put the other three caps inside the can. I then started to hook all the wires back up to their proper terminals, soldered in the new carbon comp. resisters and installed the new diodes that I got from Jim McShane. I also wound up replacing two wires, the white wire on the single section, and the purple wire on the multi-section cap with new teflon coated wire that I also got from Jim. The original wires condition were suspect so I decided to change them out.:thmbsp:Next installment: the startup
Attachments
rcflybob
Member
Sweet Music
Hello everyone,
I've been meaning to post an update for a week now but just didn't seem to get to it for some reason. Well, the recap on the amp is done and I hooked up the cd player to it and plugged in the speakers and with a little apprehension, turned on the power and sweet music started to come from the speakers. I let it play for a couple of hours and it just seemed to get better and better sounding, as everything got warmed up.
I also finished doing the recapp on the fm tuner, that turned out to be really straight forward. All I had to replace there were just three electrolytics, and a few wires that I felt needed replacing. I didn't replace the coupling capacitors in the MPX section, because it was my understanding that if I did then I would have to have a realignment done. Also it was just to darned cramped in there and I didn't want to risk really messing something up.:yes:
After letting the amp run for a few days(not all at once though) I decided to hook the fm tuner up and see how that sounded. To my complete joy the tuner sounded beautiful also. Here are some pics of the amp and tuner now that they have been cleaned up and recapped.
I would like to thank everybody who helped me along with this project, especially Analog Addict, Tom Bavis, Audiodon,and Jim McShane.:thmbsp:
Hello everyone,
I've been meaning to post an update for a week now but just didn't seem to get to it for some reason. Well, the recap on the amp is done and I hooked up the cd player to it and plugged in the speakers and with a little apprehension, turned on the power and sweet music started to come from the speakers.
I let it play for a couple of hours and it just seemed to get better and better sounding, as everything got warmed up. I also finished doing the recapp on the fm tuner, that turned out to be really straight forward. All I had to replace there were just three electrolytics, and a few wires that I felt needed replacing. I didn't replace the coupling capacitors in the MPX section, because it was my understanding that if I did then I would have to have a realignment done. Also it was just to darned cramped in there and I didn't want to risk really messing something up.:yes:
After letting the amp run for a few days(not all at once though) I decided to hook the fm tuner up and see how that sounded. To my complete joy the tuner sounded beautiful also. Here are some pics of the amp and tuner now that they have been cleaned up and recapped.
I would like to thank everybody who helped me along with this project, especially Analog Addict, Tom Bavis, Audiodon,and Jim McShane.:thmbsp:
Attachments
Saint Johnny
Bon Ton Roule
Great write up and pictures!! :thmbsp:
I vote for STICKY!
I vote for STICKY!
scratch1676
New Member
nice job!
No thanks necessary. I'll just use your well documented work as a primer when I get started on mine...Of course, who knows when that will be.....