Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Philco 77 volume control
#16

I doubt if you'll find a 1750 ohm rheostat. I wouldn't be afraid to try 1800 or even 2000 ohms.

--
Ron Ramirez
Ferdinand IN
#17

2000 Ohms is fine - actually this is what's quoted in the Rider's for it.

Bigger wattage is always OK, as long as you can fit it.

You cannot venture too far in the larger impedance area - it will screw up both 224 tubes Cathodes' potentials, especially the 2nd one.
#18

Personally, I think Terry's (7estatdef) idea has great merit; however, I must add that converting a 65 to operate with AVC is not a project for the novice. I would try it if it were mine.

--
Ron Ramirez
Ferdinand IN
#19

How about something like this?

http://www.ebay.com/itm/220560054014?ssP...1497.l2649

-Ken
#20

If they fit the size, I think you can use them. There will be a little less regulation but you may not notice it that much.

PS. Ohmite still makes those, but for the price you can't beat this Russian deal of yours. And , in my experience, Russian military components are (were that is) very good. They no longer make'em, they buy Chinese.

http://www.mouser.com/Passive-Components...at&FS=True

PPS. You can add a 200 Ohm 2W resistor on either end (to keep the voltages accurate) in series (to bring the total to 1.7K), and see where it works the best, and leave it there.
#21

Thanks for all your great advice everyone! I put in the Russian surplus rheostat and it works great! I'm now in the process of stripping the body with Citristrip , which works great and you can use it indoors.

Thanks again,
Ken




Users browsing this thread:
[-]
Recent Posts
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM
Zenith H725
Ed; One material that I have seen, but never tried for this was material for making exhaust gaskets, it's similar to ...Arran — 11:42 PM
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM
The list of my radio & TV collection!
Magical chords of forgotten melodies, old nostalgic music on an old radio... Saturday night blues on the Mid-Waves on an...RadioSvit — 12:20 PM
Philco 42-345 Restoration/Repair
Thank you MrFixr55 the issue with this radio is that the internal coil antenna is missing and there was a wire in its pl...osanders0311 — 11:34 AM
Philco 610B oscillator wiring
Regarding the oscillator circuit which is comprised of the 6A7's cathode, control grid, and screen grid. These elements ...Radioroslyn — 10:33 AM
Philco 42-345 Restoration/Repair
Hi OSanders, First off, welcome to the Philco Phorum where Phine Phamily-Phriendly Pholks Phull of Philco Phacts and P...MrFixr55 — 08:41 AM
Philco 42-345 Restoration/Repair
Today I've been reading through the site trying to learn more about this radio. I also soldered the lose power cord cabl...osanders0311 — 08:24 PM

[-]
Who's Online
There are currently no members online.

>