1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Other Radios (Non-Philco)
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Threaded Mode
Grunow 654.. No Audio
vecher
Phorum Expert
*****
Posts: 933
Threads: 140
Joined: Mar 2015
City: Lansdale State, Province, Country: PA
#1

11-28-2018, 07:04 PM
Just recapped.. turned on and at 100 Volts in draws 400 Ma..

B+ to ground is approx 310 Volts DC..

No audio.. When turning volume up and down get scratches.. No noticeable Hum..

Can scan schematic . Replaced the Bias cell with Watch battery.. Plus to Ground..

Skip
Find
vecher
Phorum Expert
*****
Posts: 933
Threads: 140
Joined: Mar 2015
City: Lansdale State, Province, Country: PA
#2

11-28-2018, 07:28 PM
OK Here are schematics..


[Image: https://farm5.staticflickr.com/4843/4518...c178_b.jpg]

[Image: https://farm5.staticflickr.com/4822/4518...af0e_b.jpg]


[Image: https://farm5.staticflickr.com/4828/4518...ee59_b.jpg]


OK  On second picture  The Black and Yellow leads were reversed.. I put them to match the schematic so the Resistance of field coil would be right.. Did I goof???

Skip
(This post was last modified: 11-28-2018, 07:30 PM by vecher.)
Find
morzh
Odobenus rosmarus
*****
Posts: 15,811
Threads: 553
Joined: Oct 2011
City: Jackson, NJ
#3

11-29-2018, 04:02 PM
When touching 2nd det cap or the output tube's grid, is there hum?
Are there voltages on plates?
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
(This post was last modified: 11-29-2018, 04:06 PM by morzh.)
Find
vecher
Phorum Expert
*****
Posts: 933
Threads: 140
Joined: Mar 2015
City: Lansdale State, Province, Country: PA
#4

11-29-2018, 06:05 PM
Ok  Stupid mistake again.. I forgot to install a resistor.. No voltage to OSC.. After install worked correctly..

Next Question  Where is the best spot to hook up my VTVM to measure the AVC Voltage?  Cannot get yo speaker voice coil to put on my output meter..

Skip
(This post was last modified: 11-29-2018, 06:06 PM by vecher.)
Find
« Next Oldest | Next Newest »




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 41-608 changer coupler
3D-printing...short of machining, of course. Or molding.morzh — 05:20 PM
Philco 41-608 changer coupler
Thanks, Morzh. That solves the issue of the rubber pieces. Now, I need to find a way to replicate the pot metal piec...alangard — 05:07 PM
12' Philco
If it is 12', either Kareem or Andre would have to jump pretty high to look at the front panel. Kareem would have an e...morzh — 01:48 PM
12' Philco
And here's a story about the tires on the truck. Same "no-stoop" guy must have installed these! Take care a...GarySP — 01:17 PM
Hickok AC51 tube tester
I think they have only shown the secondaries of the transformer. Two of them feed the rectifiers' filaments.morzh — 12:58 PM
IF can wire size and Rubber mounts?
Arran If the wire inside cans is the gauges you mentioned, the sole reason for that would be mechanical, to stiffen t...morzh — 12:56 PM
12' Philco
Rod, Yes, I know, but the Giant Philco is not around anymore either, so I go by whoever was alive fairly recently. H...morzh — 12:54 PM
Hickok AC51 tube tester
Absolutely no one is going to reverse engineer that circuit. Even the iron core is missing.RodB — 10:37 AM
IF can wire size and Rubber mounts?
Thanks to both members for your help regarding wire and tuner mtg supports. regards--Johngeorgetownjohn — 09:33 AM
Hickok AC51 tube tester
Note that no power cord, power switch, or power transformer switch are shown. That (along with my experience with full s...DaleHCook — 07:09 AM

[-]
Who's Online
There are currently 5098 online users. [Complete List]
» 2 Member(s) | 5096 Guest(s)
AvatarAvatar

>
  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Other Radios (Non-Philco)