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

The 39-116 project: the beginning
#29

The volume control finally gave up the ghost last night. I was testing a homebrew cap in the motor circuit (yes, the motor did run better, faster.. it had been annoyingly slow) and turned the set off with the front panel control.. never came on again. The shaft just spins in the control without moving the innards. Apparently, this control has a sort of slip clutch mechanism inside to allow the shaft to spin once the control has reached either limit, so as not to damage the control if the motor is run for too long in either direction. It's not "clutching" well enough anymore, so it won't toggle the power switch. Oh well, the control was all sorts of flakey anyway, with lots of dead spots.

I've written Mark Oppat to see what he can come up with.. but I may just have to find a donor part. I've temporarily subbed in a 500K pot/switch and the volume goes up and down smoothly with no crackle. Unfortunately, the thing's got no loudness tap and is too low a value to allow the tone control to do anything.


Messages In This Thread
The 39-116 project: the beginning - by BrendaAnnD - 03-20-2015, 05:47 AM
RE: The 39-116 project: the beginning - by morzh - 03-20-2015, 10:39 AM
RE: The 39-116 project: the beginning - by morzh - 03-20-2015, 02:39 PM
RE: The 39-116 project: the beginning - by morzh - 03-28-2015, 11:54 AM
RE: The 39-116 project: the beginning - by morzh - 03-28-2015, 12:43 PM
RE: The 39-116 project: the beginning - by morzh - 03-29-2015, 11:04 AM
RE: The 39-116 project: the beginning - by morzh - 03-29-2015, 11:37 AM
RE: The 39-116 project: the beginning - by morzh - 04-15-2015, 09:39 AM
RE: The 39-116 project: the beginning - by morzh - 04-15-2015, 09:59 AM
RE: The 39-116 project: the beginning - by BrendaAnnD - 04-16-2015, 04:21 PM
RE: The 39-116 project: the beginning - by morzh - 04-16-2015, 05:11 PM
RE: The 39-116 project: the beginning - by murf - 04-19-2015, 05:49 PM
RE: The 39-116 project: the beginning - by Edisla - 10-24-2017, 03:55 PM



Users browsing this thread: 10 Guest(s)
[-]
Recent Posts
The speaker table error?
G  10-1/2"       65, 76, 87, 95 Push-Pull 45's 2766 0.7 550 3200 H   10-1/2"    77, 96 Push-Pull...morzh — 09:26 PM
A Marconi model 86
I have a Stromberg, one of the early ones, seems early 30s. This is what I call a back breaker. None of the early Philc...morzh — 08:28 PM
A Marconi model 86
A backbreaker.....PaulPaul Philco322 — 08:12 PM
A Marconi model 86
>>What a behemoth! A Juggernaut.morzh — 07:47 PM
Philco 70 antenna lead
I am not sure I understood about the coils and the mush. I looked an more than one coil in 20, 70, 90, 60, Zeniths and ...morzh — 07:46 PM
A Marconi model 86
:e_biggrin: What a behemoth!  I hope the final result is as much a quality sounding example!  Keep us posted on your pro...GarySP — 07:32 PM
A Marconi model 86
I should add that the double conversion may only be used on the shortwave bands, but I haven't looked at the schematic t...Arran — 07:27 PM
Philco 70 antenna lead
Yes, that wire will not pick up much interference as routed - the RF at that level won't be affected, and if you have st...radio1 — 07:26 PM
Philco model 60
I'm also a member of MARC. Did you attend the Vintage Electronics Expo in Waterford, MI last month? That's where I got...GarySP — 07:22 PM
A Marconi model 86
Dan Double conversion is using two IF converters instead of one. This improves the image response. morzh — 07:15 PM

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

>