Posts: 668
Threads: 144
Joined: Jun 2011
City: Elko,MN.
Working on a 38-116 code 125 and have a question concerning bakelite blk. number 46.
This is a 4989SG which is listed on the parts list as having a single .1 uf cap.
If you look on the handy reference guide that I printed out from the Philco site, it does not list a 4989SG.
Anyone know what the proper wiring would be as far as the new .1 cap.
Lugs 1 to 2 or lugs 1 to 3 ?
Thanks,
murf
Posts: 62
Threads: 20
Joined: Apr 2015
City: Decatur Alabama
According to Ray Bintliff's book "Philco condensers and more", the 4989SG block contains one .09 cap connected from lug 1 to 3.
Posts: 668
Threads: 144
Joined: Jun 2011
City: Elko,MN.
Guess the parts list is wrong?
Posts: 668
Threads: 144
Joined: Jun 2011
City: Elko,MN.
After looking farther, I see there is a 4989DG that is not listed as well.
Schematic view and the parts list only show 3 blocks instead of the 6 or 7 blks that are used in the chassis.
What's up ?
Murf
Posts: 62
Threads: 20
Joined: Apr 2015
City: Decatur Alabama
And according to "Condensers and more" the 4989 DG is two .09 condensers, first is lug 1 to 2, second is lug 1 to 3. Lug 1 goes to chassis ground.
Posts: 1,402
Threads: 70
Joined: Oct 2007
City: Linn Creek, MO
Quote:Guess the parts list is wrong?
.09 or .1 same thing.
Steve
M R Radios C M Tubes
Posts: 62
Threads: 20
Joined: Apr 2015
City: Decatur Alabama
Oh yeah. Close enough for me.
Posts: 668
Threads: 144
Joined: Jun 2011
City: Elko,MN.
OK, thanks for the info Doc.
I guess the others that are not shown on the schematics will have to be done using the number marked on the block.
Wish it were clearly marked on the schematics so there is no guess work involved.
Thanks again,
Murf
Posts: 668
Threads: 144
Joined: Jun 2011
City: Elko,MN.
(04-10-2017, 08:54 PM)Steve Davis Wrote: .09 or .1 same thing.
Kinda figured that was the case.
Any idea why the rest of the blocks are not shown on the schematics ?
Don't want to guess on these, it is too much work to re-do these.
Thanks Steve,
Murf
Posts: 7,286
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
I took a look at the schematic and saw only one #46 cap, screen bypass for the IF amp stage. The parts list sez it's a .1mfd (probably 400v) it doesn't say dual so I'm thinking it's a single unit. Have a look at the eyelet to see if the center terminal has a wire coming up thru it.
As mention .09 hasn't been a standard value for a million years.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
Posts: 668
Threads: 144
Joined: Jun 2011
City: Elko,MN.
Hi Terry,
Yes I can see the leads coming thru the rivets, but why don't they show all of the Bakelite blocks on the schematics?
Hate guess work.
Thanks,
Murf
Posts: 736
Threads: 26
Joined: Jun 2013
City: Hayward, California
As im sure you all knew... Doc is right on the two cap blocks info. Just wanted to put my 2 cents worth in. 
Posts: 7,286
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
Ok....
Does resistor #45 connect between the two ungrounded terminal of 46??
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
Posts: 668
Threads: 144
Joined: Jun 2011
City: Elko,MN.
(04-10-2017, 10:39 PM)Radioroslyn Wrote: Ok....
Does resistor #45 connect between the two ungrounded terminal of 46??
Yes there is.
Started recapping the blocks today.
So far so good. 3 down and 3 to go.
Murf
Posts: 7,286
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
Ok The other cap in that block is #9 a .05 (a 473 in these new fangled numbers). This is what the schematic shows, parts layout sez different. Having a extra .05mf isn't going to make any difference.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
(This post was last modified: 04-11-2017, 07:56 PM by Radioroslyn.)
Users browsing this thread: 3 Guest(s)
|
|
Recent Posts
|
|
Philco 42-390, code 121 speaker
|
| >>A closer examination of the very small print schematic indicates that the speaker is a PM type.
This shows a ...morzh — 05:18 PM |
|
Philco 60 Squealing
|
| Litz is typically tinned by simply rubbing it with the soldering iron tip while immersed in solder (and a bit of rosin f...morzh — 05:14 PM |
|
Philco 6K7
|
| The suppressor grid (if by G3 you mean the S) is usually at the Cathode potential, which in this caes is GND.
I am not ...morzh — 05:10 PM |
|
Philco 16B Parts
|
| Thanks for the reply. Unfortunately the radio was removed before bidding was over so I didn't get a chance to bid.dconant — 04:10 PM |
|
Philco 16B Parts
|
| Hi Dan,
Mike is correct, there's a lot of painted stuff on the chassis but it looks pretty good. The sm is all there,sp...Radioroslyn — 03:50 PM |
|
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
|
|
Hi Cap'n Clock,
Unfortunately, I do not have this radio. This is a shame because this should be a good performer. 2A...captainclock1988 — 03:43 PM |
|
Philco 42-390, code 121 speaker
|
| Using a 5W 1.5k ceramic resistor in place of the field coil and using a 4 ohm PM speaker, I was able to bring the radi...Stevelog — 02:57 PM |
|
Philco 60 Squealing
|
| I have taken out the 2nd IF and found a problem or not. I believe the coils are litz wire. There is a very small strand ...dconant — 02:13 PM |
|
Philco 6K7
|
| I am restoring a Philco 37-60. The am reception is very good, but the shortwave is very weak. Run 6 Philco removes the g...bobbyd1200 — 01:35 PM |
|
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
|
| Hi Cap'n Clock,
Unfortunately, I do not have this radio. This is a shame because this should be a good performer. 2A5...MrFixr55 — 06:48 AM |
|
Who's Online
|
There are currently 4397 online users. [Complete List]
» 4 Member(s) | 4393 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
