Posts: 70
Threads: 17
Joined: Jan 2006
City: Newbern
State, Province, Country: Tennessee
Have a RP3. Recapped, replaced resistors, and installed a new crystal cartridge. Still will only broadcast about 2ft. no more. Checked tubes, strong. am I missing something?
Posts: 2,118
Threads: 112
Joined: Jun 2010
City: Medford OR (OR what?)
I would suspect that many people have no idea what an RP3 is (I once worked on a Sonora RP3). Maybe if you told us a little more about it - picture?
https://www.radiomuseum.org/r/philco_rp3.html
"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
Posts: 70
Threads: 17
Joined: Jan 2006
City: Newbern
State, Province, Country: Tennessee
It's a Philco wireless 1939 record player.
Posts: 1,191
Threads: 25
Joined: Jan 2014
City: Wellborn Florida
What kind of ant. are you using?
Posts: 70
Threads: 17
Joined: Jan 2006
City: Newbern
State, Province, Country: Tennessee
one used in the original factory design.
Posts: 7,285
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
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: 70
Threads: 17
Joined: Jan 2006
City: Newbern
State, Province, Country: Tennessee
Posts: 7,285
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
So how much ac voltage do you have from pin 2 of the 84 to chassis and pin 3 to the chassis?
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: 2,118
Threads: 112
Joined: Jun 2010
City: Medford OR (OR what?)
So you have a 6A7 doing its thing ( it is normally a osc/mixer in a receiver).
What is your plate voltage? Have you looked at it with a scope, how about a signal sniffer. I would suspect that a really good 6A7 might be required to get good range, not my favorite tube - still trying to get the Strat to osc. on band 5, reliably.
"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
(This post was last modified: 12-09-2020, 06:26 PM by Phlogiston.)
Posts: 70
Threads: 17
Joined: Jan 2006
City: Newbern
State, Province, Country: Tennessee
105.1 v pin 2 and 105.4 pin 3
Posts: 70
Threads: 17
Joined: Jan 2006
City: Newbern
State, Province, Country: Tennessee
plate on the 6A7 is 101.5v
Posts: 2,118
Threads: 112
Joined: Jun 2010
City: Medford OR (OR what?)
Is that 1 meg variable resistor good? What happens when you adjust it?
"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
Posts: 70
Threads: 17
Joined: Jan 2006
City: Newbern
State, Province, Country: Tennessee
yes. it shuts down the transmitting when turned be it on a little over 2 ft.
Posts: 2,118
Threads: 112
Joined: Jun 2010
City: Medford OR (OR what?)
I would think that it would vary the RF output considerably through the range, 0 to 1meg. So if you measure from the high side (xtal) to ground you get 1 meg.? I have to ask - again, because these Philco controls are often the problem, especially if they have been "cleaned".
It may also vary the output freq. a little. What is you output freq?
"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/
Posts: 15,818
Threads: 554
Joined: Oct 2011
City: Jackson, NJ
6A7 tubes are often weak. The Mixing part.
Maybe it just needs replacement.
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.
Users browsing this thread: 2 Guest(s)
|
|
Recent Posts
|
|
Philco 60 Squealing
|
| I have recapped and replaced out of tolerance resistors and so on. Radio plays nicely on fairly strong stations. The pro...dconant — 10:55 AM |
|
Philco 46-420 Code 121 Reception issues
|
| Welcome Eric,
I agree with Bob and far as the two main electrolytic filter capacitors did you change them yourself or w...radiorich — 11:43 PM |
|
Philco 46-420 Code 121 Reception issues
|
| You mentioned the Philco manual and going through the check points...just to be sure we're on the same page here's the m...klondike98 — 08:13 PM |
|
Philco 42-1008 conversion kit
|
| Interesting. I haven't seen that before.klondike98 — 07:02 PM |
|
12' Philco
|
| Yes I had looked for it on the web as well some time back and could not find it. I was glad to see it turned up in Ron'...klondike98 — 06:59 PM |
|
Shadow Meter Bulb
|
| Now if you had a set with a tuning light then the bulb type is important to the circuit, some sets used those prior to t...Arran — 04:58 PM |
|
Shadow Meter Bulb
|
| Ok. Thanks for the correction.RossH — 03:09 PM |
|
Model 28L
|
| For 28 you will probably need to buy a Hammond 125CSE. Or any of the series of the power you need, with SE suffix. Then ...morzh — 02:09 PM |
|
37-60 revision 6
|
| I am restoring a Philco 37-60 and it shows run 6 they removed the ground from G3 of the 6K7G and put the G3 to -2.5v for...bobbyd1200 — 01:01 PM |
|
Shadow Meter Bulb
|
| Mike is correct on the bulb connection, two separate circuits. I found that by rotating the bulb and sliding it forward ...RodB — 12:19 PM |
|
Who's Online
|
There are currently 4654 online users. [Complete List]
» 3 Member(s) | 4651 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
