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How to clean a tuner (analog)

dr*audio said:
You shouldn't have to remove the frontend to replace the trim caps, unless they are on the pcb and not mounted on the tuning cap. Take pictures of the routing of the dial cord. The service manual should have a diagram as well. Another trick is to remove the wheel on the tuning cap and use a wire to hold the wheel unde tension, keeping the string wound.
Click to expand...

Unfortunately this tuner has front end which is separate module stacked and soldered over main PCB. I will try that holding that tuning wheel. Let's see.

Thanks.
 
Hello,

I am trying to get my vintage tube RCA 9-t-2 tuner (RC-1155B) to work on my 59 RCA New Orthophionic SHP-9 stereo.

I've replaced most of the carbon reistiors, the electrolytic caps, checked tubes on the tester.

I have cleaned the tuner with CRC cleaner.
Still no sound. Just a hum when the volume is turned up.
There is a sound when I switch the am-fm switch back and forth.
The amp has already been rebuilt with new caps and restiors.

Any advice??

Thanks
 

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NCTubeLover said:
Hello,

I am trying to get my vintage tube RCA 9-t-2 tuner (RC-1155B) to work on my 59 RCA New Orthophionic SHP-9 stereo.

I've replaced most of the carbon reistiors, the electrolytic caps, checked tubes on the tester.

I have cleaned the tuner with CRC cleaner.
Still no sound. Just a hum when the volume is turned up.
There is a sound when I switch the am-fm switch back and forth.
The amp has already been rebuilt with new caps and restiors.

Any advice??

Thanks
Click to expand...

This is outside the scope of this thread. You should start a separate thread under the Tuners section and you'll get more results.
For now I can only say:
1. Check the tubes.
2. Get the service manual and check the voltages, particularly on the power supplies.
 
Just wanted to say THANKS! for the great sticky about cleaning tuners Dr. Audio! I got some more of the CRC QD Contact Cleaner No residue Plastic Safe and finished doing the cleaning on my Pioneer TX-9800. Left it to dry for a day or two and when I hooked it back up it locks on, stays locked and is perfectly centered. Sounds wonderful too! Just kicks butt with a good station and makes enjoying my FM worth while again. Thanks again for the many tips and ideas for some very easy basic cleaning, tips and hints that resurrects dusty old tuners to great feasts for the ears once again! :music: Happy Listening is here again!
 
What a difference.

dr*audio,

I just today read your thread you started. I was able to get some CRC QD Cleaner and got my tuner cap cleaned, not lubed yet, I have the FaderLube coming.

Thank you for the directions. Marantz 2100. It made a tremendous amount of difference.

George.
 
Last edited:
omishra said:
Thank you, you are right. I need look out for that trimmer. I may have few but different shape. Still job of getting front end out an stringing again is massive for me.
Click to expand...

Final update, it started working again. I don't know but same trimmer is working perfectly. In fact I took out that bad guys and pushed more IPA into it and kept for drying almost 2 weeks. Given more rotation in between. Yesterday I finished putting it in and aligning it again using IF of another digitally tuned tuner. I jumped wires from that tuner to this one.

This made things clear that solution changes its capacitance and detune the circuit badly. So careful about trimmers.

Thanks Dr*audio for all input!
 
Well Well....Were have I been? Thanks for the Thread!!!!!!

My KT-7500 had noise when tuning at lower stations.

Not anymore...:music: And the Signal strength is better...

Need to clean this to Sony STR-6800SD...
 
Thank's everyone for that great thread.
I love receivers, I got five of them. Now I'm working on, re-capping a Sansui 9090, you can follow the steps here: http://www.audiokarma.org/forums/showthread.php?t=416818
I'm happy to see all the passionate people here on AK forum.
So my Sansui 9090 is on the operation table. I clean and soak (pots)every thing on it.The only part left that need a cleaning is the tuner section.
I've read all this thread and I plan to follow the valuable advice from DR.Audio.
But here's the thing, the cap and shield are solder together. I don't have a good access to do a good cleaning!
I would like to know, if one of you guys as already open a 9090 tune shield box?
 
Jpdspin said:
Thank's everyone for that great thread.
I love receivers, I got five of them. Now I'm working on, re-capping a Sansui 9090, you can follow the steps here: http://www.audiokarma.org/forums/showthread.php?t=416818
I'm happy to see all the passionate people here on AK forum.
So my Sansui 9090 is on the operation table. I clean and soak (pots)every thing on it.The only part left that need a cleaning is the tuner section.
I've read all this thread and I plan to follow the valuable advice from DR.Audio.
But here's the thing, the cap and shield are solder together. I don't have a good access to do a good cleaning!
I would like to know, if one of you guys as already open a 9090 tune shield box?
Click to expand...

Some of the Sansuis have the tuner shield soldered on but you can desolder the tabs and remove it. Some you have to completely remove the tuning cap to get to the shield to remove it. I can't remember which this is. The ones that you have to remove the tuning cap, I just spray a non - residue cleaner into the holes in the shield, aiming at the shaft, rotate the shaft back and forth a bunch of times and leave it at that. It works fine and I haven't had any that need re-treated yet.
 
I will follow your advice, anyway if it work well, that will be couple of hour in the bank, to do other restoration. If not enough I just have to re-open it another time.
Thank'S
I will keep it simple...
I like your beeswax trick.

JP.
btw. I love Rickenbackers.
 
I have a Kenwood KT-5300 that was working fine yesterday however I noticed it wasn't picking up the stations like it used to. I popped the top off and used my Radio Shack control/contact cleaner and lubricant to spray inside the switches. I let it sit for 8 hours and then went back and worked all the switches well over 50 times. I buttoned it up and hooked it back up and it lights up the stereo indicator lights when the station is tuned but I have only very faint sound coming out of the speakers and I have to turn the amp up quite a ways just to barely hear it. I cannot figure for the life of me what happened. I didn't touch anything else I just cleaned the switches. Anyone have a clue what's going on with this thing?
 
moejr said:
I have a Kenwood KT-5300 that was working fine yesterday however I noticed it wasn't picking up the stations like it used to. I popped the top off and used my Radio Shack control/contact cleaner and lubricant to spray inside the switches. I let it sit for 8 hours and then went back and worked all the switches well over 50 times. I buttoned it up and hooked it back up and it lights up the stereo indicator lights when the station is tuned but I have only very faint sound coming out of the speakers and I have to turn the amp up quite a ways just to barely hear it. I cannot figure for the life of me what happened. I didn't touch anything else I just cleaned the switches. Anyone have a clue what's going on with this thing?
Click to expand...

You should really start your own thread for this, but check the muting switch, try turning it off.
 
Thanks. Found that at my local electronics store for $6. Now I just need to stop by a music store to get the Fader Lube (this stuff is hard to find in Canada, but apparently Long & McQuade has it).
 
belgianbrain said:
Anyone have a problem with using this product to clean my variable capacitor ground contact points?

http://asalco.com/index.php/en/elec...eaners-2/item/contact-2000-2-2?category_id=33
Click to expand...

I just followed your link and read the MSDS sheet for it. This material is flammable (unlike most contact cleaners that use chlorinated hydrocarbons). This just has isopropanol, ethanol and n-hexane. Note that hexane is the active ingredient in anti-slip sprays used for fan belts in cars, so it makes rubber swell up and get tacky. It is usable, but keep it away from rubber and do not spray into something like a power switch where remaining vapours may explode when ignited by a spark from switching.
 
Thanks for the post

I bought an Accuphase T-101 that would not hold onto a station for long and was real nasty sounding when changing stations. I bought the materials listed here and followeed the directions. It is now like a new tuner. The dial is right on the numbers, no scratchy sounds when changing stations, and no more dirft. I did not do it right the first time as I did not put the faderlube where the ground wipers meet the rotating part. Once I put the faderlube at all 8 of these connections (2 on each gang) it works great. Thanks again for the great instructions.
 
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