Sears silvertone question
Posts: 1,475
Threads: 69
Joined: Nov 2012
City: Kansas city, MO.
I have an Sears silvertone console with wire recorder and phono. Model 101-831-A.
After recapping the receiver section and changing out of tolerance resistors. I powered it up on the bench.
It plays on both am & FM. My question is: How much current draw should it have on the amp meter in series with the power line cord? It is reading btwn. 850mA & 900mA on the the amp. gauge. The line voltage is set to 117 V.
This is a 12 tube unit with the following tubes
2--7C7s
2--7W7s
2--7C5s
1--7A6
1--7C6
1--7N7
1--7F8
1--6AG5
1--5U4G
Help is greatly appreciated. Thanks
(This post was last modified: 05-07-2016, 02:38 PM by KCMike.
Edit Reason: Add info
)
Posts: 2,118
Threads: 112
Joined: Jun 2010
City: Medford OR (OR what?)
Does the unit have a wattage rating?
Divide the wattage rating by 117V, see if it is .9.
"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
Posts: 1,475
Threads: 69
Joined: Nov 2012
City: Kansas city, MO.
Yes I found it inside the cabinet-- 215 watts. I came up with 1.837 Amps so I guess it is okay? The wire recorder is also the amplifier in this unit and I currently have it apart for repairs. would that explain the lower rating I'm getting?
Posts: 16,230
Threads: 563
Joined: Oct 2011
City: Jackson
State, Province, Country: NJ
Any today's computer is a power hog compared to that.
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: 1,475
Threads: 69
Joined: Nov 2012
City: Kansas city, MO.
This is true. Its just that most of the radios I've done has drawn about anywhere btwn. 300mA and 750mA. I only had it on about 15 minutes and the power transformer was barely warm . So I wanted to check with some of you guys before I
unintentionally did damage.
Posts: 2,118
Threads: 112
Joined: Jun 2010
City: Medford OR (OR what?)
(05-07-2016, 03:44 PM)KCMike Wrote: Yes I found it inside the cabinet-- 215 watts. I came up with 1.837 Amps so I guess it is okay? The wire recorder is also the amplifier in this unit and I currently have it apart for repairs. would that explain the lower rating I'm getting?
Yes. You would have to run all of the devices at the same time to come up to the rated wattage. Sounds like you are about right.
Now if you want to be safe you can check the plate dissipation on the driver and output tubes against the RCA spec. These are the places where a bad cap or wrong screen voltage can make a real difference but you'll see it in the plate dissipation or voltage on the pins.
"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
Posts: 1,475
Threads: 69
Joined: Nov 2012
City: Kansas city, MO.
Thank you. I'm going to do alignment on it tomorrow and will get the tube specs and check that first. I did replace all the caps and there was plenty of them. 20 I think.
Posts: 1,475
Threads: 69
Joined: Nov 2012
City: Kansas city, MO.
Took some voltage readings on the rectifier tube today and stopped after getting these readings.
pin 8 & 2 307 volts DC schem. calls for 375V
pin 4 & 6 284 volts AC Schem has no volt rating on 2 & 4 pin. this is the secondary of the switch side of transformer.
I don't know if the wire recorder / amplifier has to be in the circuit or not for correct volt readings. On schematic you see that amplifier has its own rectifier. I'm concerned about the high AC readings and what I should check.
Here is the schematic of the radio and amplifier kind of blurry but you can see the pin out of the 5U4G tube.
Any ideas what I should check next? Thanks
https://www.dropbox.com/home/silvertone%...ematic.pdf
Posts: 7,294
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
< 307 volts DC schem. calls for 375V
Could have a weak 5U4. See it in tv's a lot.
If you measure from p4 to p6 on the 5U4 should see about 800vac.
Terry
Posts: 1,475
Threads: 69
Joined: Nov 2012
City: Kansas city, MO.
Thanks Terry. I was measuring the 5U4G tube 4&6 pin to chassis. I will test the tube again, it did show good when I tested it about 3 weeks ago when first started on this project. I don't remember the exact readings. I also have other 5U4Gs I can try. I did get the voltage readings on the out put tubes and the were within 5 volts of schem. using a fluke multi range DMM.
Posts: 1,475
Threads: 69
Joined: Nov 2012
City: Kansas city, MO.
Posts: 2,573
Threads: 337
Joined: Jun 2013
City: lawrenceville nj
kcmike
nice job I like it  
sam
Some day, and that day may never come, I will call upon you to do a service for me. But until that day, accept this justice as a gift
mafiamen2
Posts: 1,475
Threads: 69
Joined: Nov 2012
City: Kansas city, MO.
Thanks Sam. Now to get some strong backs to move it upstairs to the den. 
Posts: 2,118
Threads: 112
Joined: Jun 2010
City: Medford OR (OR what?)
(11-15-2016, 09:22 PM)KCMike Wrote: Thanks Sam. Now to get some strong backs to move it upstairs to the den.
It is nice that somebody is saving these. Their size limits most of us.
And, to that point, some of my display is upstairs. I have to assemble the radio on-site rather than try to get the whole thing up the steps.
"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
Posts: 3
Threads: 0
Joined: Aug 2017
City: Dallas, TX
Recently I bought one of these Silvertone consoles at an auction close out. Did you ever find a schematic?
Users browsing this thread: 1 Guest(s)
|
|
Recent Posts
|
|
Philco 630csx power cord
|
| Have you opened up that plug? It may be that the third wire is connected to that brass stud on the side of the plug and ...Arran — 02:57 AM |
|
Model 27-84 BUZZ?Humm?
|
| I would have to look at the schematic but it's not uncommon in 1930s AC radios to have the negative of one filter cap co...Arran — 02:46 AM |
|
Model 27-84 BUZZ?Humm?
|
| Hello Bruce,
First all do mean a 37-84b ?
Did you take any before and after pictures ?
is it a buzz like when you touch...radiorich — 01:59 AM |
|
B&K 1077B no video - problem solved
|
| Hello Tim,
Yes, I even check all of my replacement parts when I install them and I too had a capacitor go bad not long a...radiorich — 01:54 AM |
|
B&K 1077B no video
|
| I got back into it tonight. Problem found and resolved! Sometimes it helps to take a break and think things over. It was...TV MAN — 12:40 AM |
|
6TPZ and 5TPO Radio Help
|
| Thank you. I have to take a break from it for about a week. I'll have to do some thinking. I was toying with the idea ...R3Sons — 12:21 AM |
|
Model 27-84 BUZZ?Humm?
|
| Drowning in a overloud buzz/Humm. Have already changed filter caps,bakelite blocks( caps),out of speck resistors,checked...Bruce — 12:17 AM |
|
Philco 630csx power cord
|
| Hello Mike
Here is the Link to the company the place is called Grand Brass lamp parts .
I buy all my Lamp parts plus ...radiorich — 12:00 AM |
|
Philco 40-120C Filament Wiring
|
| Is the tube in your radio actually 35Z3 or 35Y4, or something else?morzh — 10:55 PM |
|
Philco 630csx power cord
|
| Second Rich's opinion.
Run a separate antenna wire. Use a separate plug.
Rich
Where did you get this wire? Se...morzh — 10:51 PM |
|
Who's Online
|
There are currently 2136 online users. [Complete List]
» 1 Member(s) | 2135 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
