Posts: 44
Threads: 4
Joined: Dec 2013
City: Freeport, LI, NY
Hi Guys......
On the bench is a model 96 and I'm having a few issues....
Is there a list for the resistor values? Other than part numbers and Bintliff's Philco Cap Guide Pt. II, I was just wondering if a Philco list can be found.
Can someone furnish me with the resistance value of the field coil? Mine's reading about 2,200 ohms DC. On a test, I had 334 VDC going into the FC and 150 VDC coming out. It should be about 225 VDC. Monitoring the amp draw of the radio, it's around 800 ma. I think this coil is shorted but knowing the actual resistance value would be a big help. (the cap can (p/n 3754) has been recapped and works fine.
Tnx...
...Jim
Posts: 16,509
Threads: 572
Joined: Oct 2011
City: Jackson
State, Province, Country: NJ
Go to the sch section here at Philcoradio, open 96 sch, it has all resistors.
2,200 ohm looks right, also the values of field coils are not likely to change, it is either right value, or open, rarely short.
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.
Posts: 44
Threads: 4
Joined: Dec 2013
City: Freeport, LI, NY
(07-01-2015, 03:01 PM)morzh Wrote: Go to the sch section here at Philcoradio, open 96 sch, it has all resistors.
2,200 ohm looks right, also the values of field coils are not likely to change, it is either right value, or open, rarely short.
Where's the schematic section?
Posts: 16,509
Threads: 572
Joined: Oct 2011
City: Jackson
State, Province, Country: NJ
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.
Posts: 7,301
Threads: 269
Joined: Dec 2009
City: Roslyn Pa
When I look at the diagram the output of the p/s goes into the FC then the other side of the FC goes to #45 to ground. I think what you are seeing is the voltage drop across the FC+#45. That not to say that you could have a bad filter cap or any of the bypass caps w/the resistors inside. Always use mylar cap to replace the filters
Terry
Posts: 16,509
Threads: 572
Joined: Oct 2011
City: Jackson
State, Province, Country: NJ
Jim
1. A shorted coil would give you MORE voltage at the output, not less.
2. A shorted coil would not be 2,200 Ohms.
3. What you have is an excessive draw by the load. Have you recapped your radio? What else have you checked so far?
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.
Posts: 2,128
Threads: 18
Joined: Oct 2008
City: Merrick, Long Island, NY
Agree, if there was any intermittant in field coil to frame (which is probably ground potential,) could draw current. Check the coil out of circuit to probably prove innocent or otherwise.
Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand
State, Province, Country: Indiana
The original Philco speaker field was 3,200 ohms.
--
Ron Ramirez
Ferdinand IN
Posts: 7,301
Threads: 269
Joined: Dec 2009
City: Roslyn Pa
Don't think the spkr frame is at ground potential. Just has 4 wires for the FC and OPT. This mounted to the wood cabinet. Did you measure the FC resistance with the spkr unplugged from the chassis?
Terry
(This post was last modified: 07-01-2015, 08:37 PM by Radioroslyn.)
Posts: 44
Threads: 4
Joined: Dec 2013
City: Freeport, LI, NY
Hi Guys...
Ron's number seems to prove out that the FC is shorted. I'm reading 2,200 ohms DC. Together with the open primary on the OPT, the main problem is right here. The FC can be taken out of the speaker fairly easily so I think I'll rewind it.
Anyone know of a rewinding shop on the East Coast?....or have another Model 96 speaker they can spare?
Again Tnx....
...Jim
(This post was last modified: 07-02-2015, 10:16 AM by Jim Koehler.)
Users browsing this thread: 1 Guest(s)
|
|
Recent Posts
|
|
Model 70 Cabinet Trim
|
| Hello musar,
First all welcome to the forum and yes that is true that steve stopped making trim .
Sincerely Richar...radiorich — 12:13 AM |
|
Model 70 Cabinet Trim
|
| I have recently come into possession of a Model 70. The trim around the base needs to be replaced. If this were years ...musar — 12:07 AM |
|
philcorepairbench.com - shadow-meter
|
| Anyone know of a way to recover these files from the repair bench? Thanks.
fenbach — 11:16 PM |
|
Philco model 38 code 121 not receiving signal.
|
| That's true. Of course If I were to get a vtvm I'd probably have to sink money in to it to get it working right. Probabl...Stormlord5500 — 08:44 PM |
|
Philco model 38 code 121 not receiving signal.
|
| A DMM is good enough.
One rarely has to measure indictance, but if you do, short of getting a serious LCR meter (I hav...morzh — 07:35 PM |
|
Testing a speaker and output transformer Trutone A2-G
|
| You guy's are right on. I found a broken wire on the speaker plug that I replaced and all is well now.
Have better volu...murf — 03:43 PM |
|
Philco model 38 code 121 not receiving signal.
|
| I need to get a vtvm. I think that little component tester is just more accurate. Plus it shows the inductance which is ...Stormlord5500 — 03:07 PM |
|
Philco model 38 code 121 not receiving signal.
|
| I use a pair of Mastercraft brand DMMs from Canadian Tire, from what I read most of those DMMs use the same main chip re...Arran — 02:36 PM |
|
Philco model 38 code 121 not receiving signal.
|
| Thank you sir. Yes I feel good and also relieved because this one's been weighing on me a bit.Stormlord5500 — 11:18 AM |
|
Philco model 38 code 121 not receiving signal.
|
| It feels good don't it? Good luck on the rest.Paul Philco322 — 11:06 AM |
|
Who's Online
|
There are currently 2358 online users. [Complete List]
» 1 Member(s) | 2357 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
