Philco Roundie Hybrid

[marty59]

Most of the time if the tuner cover is missing, some "TV Repairman" had spray cleaned the tuner and left it off! Sometimes they can be a little tricky to snap back on but jeez....

If you were lucky the cover was left inside the cabinet.

Some of the dirtiest/nastiest tuners I'd see were with missing covers..Duh!!

That tuner looks like it may be a "Sarkes Tarzan". They manufactured tuners for various manufacturers including GE, etc., and would also have their own branded tubes installed with them originally.

They made that style of turret tuner.

[marty59]

Oops, forgot to mention that an easy fix to that tuner is to gently pry up on the channel strip contacts. If you notice they are shaped like a sideways question mark with one side open..(for prying up on!). You'll see some are laid down more than others so the trick is to get them about the same height as the highest. That way you're not prying up too much! Just use a real small blade screwdriver inserted as square as possible to avoid contact with the coil windings.

You can also easily remove the whole turret assembly if you'd like, but shouldn't need to.

What I did to clean those and not make a spray mess was to saturate a Q-Tip and clean/wipe those contacts. You can then take another Q-Tip or your finger and apply a little Vasolene to those contacts. As long as your tubes are ok I bet your tuner problems will "clear up!" (Sorry, couldn't resist!!)

[DaveWM]

I cleaned them with a big eraser, and then did as you described, Q tip with cleaner/lube.

Its a hybrid that has transistors in the tuner, so I hope they are not noisy, would be a mega PITA to replace them.

If the problem persist I will break out the B&K 1076 and feed an IF signal in to see if the snow is a tuner or IF issue. I hope the clean up will resolve.

I cant get at the fingers on the tuner with out major surgery, so I kept cleaning the turret nobs and rotating. The fingers are next the the UHF tuner and it is hard to get a good shot at them. I tried prying up the tuner stips but they did not want to budge and I did not want to push it. If I can get 2 or 3 in a row out I would have an easytime getting the qtip at the fingers.

Pulling the turret also looks like a pita due to all the hardware hanging on the front. Normally I can just jiggle the snow out, if no change by jiggling then I figure its not the contacts.

[DaveWM]

got the tuner figured out, push for the back side and then they will lift out.


should be back in for a trial run, just have to solder in some resistors.

[marty59]

Yea, that's right...I forgot how easy the channel strips are to remove by themselves..pretty easy to figure out!

[peverett]

If you need some 6GH8s in the future, I think I have some NOS ones.
I may also have 5GH8s and 9GH8s for series string sets.

[DaveWM]

whew....

ok put it all back together and crap

hold issues
color sync issues

crud...

but the snow is gone

so I start tube swapping, a combo of the old and new tubes gets it going again, I thought I was playing it smart by replacing the old 6GH8's with new ones that tested stronger, Now I am begining to wonder if the new ones were gassy. I will try them on my cheap emission tester for grid emissons. I tested them on the hickok 533 but not sure about how to do a gas test.

anyhoo pic is looking good and I am sweating like a stuck pig (tv is out in the garage, to heavy to move by myself). So will pick it up again tomorrow after work and see if I can get some screen shots. I just hope that color and sync issues dont come back. I only replaced the tubes since I was getting the one of the guns intermittently, and just shot gunned the chroma board. There was no excuse for messing with the sync tube, my bad, it was fine.