Posts: 5,129
Threads: 271
Joined: Nov 2012
City: Wilsonville
State, Province, Country: OR
(11-11-2016, 04:54 PM)Radioroslyn Wrote: What is it with you and IF transformers?????
Have fun!
Thanks Terry!
 yes it does seem like I'm cursed although the last IF xformer problem was all of my own making when I mis-wired something and proceeded downhill from there. This time I haven't done anything but take the big electrolytic cap box out and tease out the old capacitors from the box with some heat and patience...
[Image: https://www.dropbox.com/s/8x29igxws426un....jpg?raw=1]
[Image: https://www.dropbox.com/s/dosu4ob4sezhnt....jpg?raw=1]
Posts: 7,294
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: 5,129
Threads: 271
Joined: Nov 2012
City: Wilsonville
State, Province, Country: OR
(11-11-2016, 11:22 PM)Radioroslyn Wrote: Looks like things are unfolding!!![Image: http://philcoradio.com/phorum/images/smi...on_lol.gif]
Posts: 4,106
Threads: 310
Joined: Nov 2013
City: Kings Park NY
Times I have been electrocuted in 2021
As of 1/01/2021
AC: 4 DC: 1
Last year: 6
Posts: 16,273
Threads: 566
Joined: Oct 2011
City: Jackson
State, Province, Country: NJ
You didn't...did you?
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: 5,129
Threads: 271
Joined: Nov 2012
City: Wilsonville
State, Province, Country: OR
Thanks for posting that Kirk, it gives me some good pictures of the finish.
But what the heck is this?????? (picture is from the emerson in Kirk's post)
[Image: https://www.dropbox.com/s/7014ktqrekayk1....jpg?raw=1]
Mine definitely does not have that. It looks like someone added a candohm resistor that drops the line voltage?
I've finished stuffing the old electrolytic box. Next will be taking out the paper caps and resistors and taking out the transformer that seems to be open.
[Image: https://www.dropbox.com/s/l14wstljku27zs....jpg?raw=1]
Posts: 16,273
Threads: 566
Joined: Oct 2011
City: Jackson
State, Province, Country: NJ
This is what I think is a buck resistor that probably use to drop the voltage from the AC Mains to the filaments.
Or a Candohm, pardon my French.
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: 7,294
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
>buck resistor[Image: http://philcoradio.com/phorum/images/smi...on_eek.gif]
???? I think here in the states we call it a dropping resistor. Never heard of one being named after it's price.[Image: http://philcoradio.com/phorum/images/smi...on_lol.gif]
Sure looks like something is lost it's lunch inside the cabinet.
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: 11-14-2016, 05:24 PM by Radioroslyn.)
Posts: 16,273
Threads: 566
Joined: Oct 2011
City: Jackson
State, Province, Country: NJ
(11-14-2016, 05:23 PM)Radioroslyn Wrote: >buck resistor[Image: http://philcoradio.com/phorum/images/smi...on_eek.gif]
???? I think here in the states we call it a dropping resistor. Never heard of one being named after it's price.[Image: http://philcoradio.com/phorum/images/smi...on_lol.gif]
Sure looks like something is lost it's lunch inside the cabinet.
(and I meant to say "bucking") - yes I know we call it dropping resistor. I just felt creative and named it after the action it performs. Which is, well, a bucking action after all.
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: 7,294
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
(11-14-2016, 05:42 PM)morzh Wrote: (11-14-2016, 05:23 PM)Radioroslyn Wrote: >buck resistor[Image: http://philcoradio.com/phorum/images/smi...on_eek.gif]
???? I think here in the states we call it a dropping resistor. Never heard of one being named after it's price.[Image: http://philcoradio.com/phorum/images/smi...on_lol.gif]
Sure looks like something is lost it's lunch inside the cabinet.
(and I meant to say "bucking") - yes I know we call it dropping resistor. I just felt creative and named it after the action it performs. Which is, well, a bucking action after all. > Which is, well, a bucking action after all.
Isn't that the thing you sit on and drop a quarter in in front of the food store???
When I see bucking I think of a transformer using the pri connected to one side of the sec to buck out of phase or in phase volt adding or subtracting the sec voltage's. Like a bucking transformer. Resistor don't necessarily care about the phase relationship.
I know I have too much time on my hands[Image: http://philcoradio.com/phorum/images/smi..._crazy.gif]
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: 11-14-2016, 07:03 PM by Radioroslyn.)
Posts: 4,816
Threads: 54
Joined: Sep 2008
City: Sandwick, BC, CA
I've heard of curtain burners, as in resistive line cords, so that's the first cabinet burner I have seen. That is an absolutely stupid location, not only is it a shock hazard but it's a fire hazard as well since candohms are supposed to be mounted to a metal plate to dissipate the heat.
With regard to the Emerson 350 on fleabay, it's way too high of a price in my opinion, but assuming that one might be worth $125-150 restored it would be well worth reproducing a proper wood replacement door for this set since Terry has one to make a pattern with.
Regards
Arran
(This post was last modified: 11-15-2016, 06:23 AM by Arran.)
Posts: 5,129
Threads: 271
Joined: Nov 2012
City: Wilsonville
State, Province, Country: OR
(11-15-2016, 06:19 AM)Arran Wrote: ... it would be well worth reproducing a proper wood replacement door for this set since Terry has one...
Thanks Arran, I'll be attempting a reproduction of the door. I can use my good door as a pattern.
Posts: 5,129
Threads: 271
Joined: Nov 2012
City: Wilsonville
State, Province, Country: OR
[Image: https://www.dropbox.com/s/yy31aa3s67zt2j....jpg?raw=1]
I got the IF transformer out that had the open coil and unfortunately there was not anything obvious that was causing the open. The two ends of the coil were solidly connected to the lugs. I re-heated the solder at each lug to see if that would help, no dice. I unsoldered the two ends of the coil, sanded the ends clean and rechecked continuity...no dice. I uncoiled the first turn of the coil and it came off nicely so no break at the very beginning, and I can't unwind from the bottom...so it looks like this coil is dead unless someone has another idea.
I don't have any old Philco coils lying about as Terry suggested but I think this coil from Antique Radio Supply should work. https://www.tubesandmore.com/products/coil-oscillator Is that correct???
Can I just wire it in directly like this????
[Image: https://www.dropbox.com/s/f3795czz6w5dqi....jpg?raw=1]
Posts: 7,294
Threads: 268
Joined: Dec 2009
City: Roslyn Pa
No. That coil is for the oscillator. What you need is an IF transformer. If you had a spare 455kc orc so transformer you could dissect one of it's coils and mount it in your current transformer. Must have trimmer cap to adj not a slug tuned one and has to fit in your old can.
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: 5,129
Threads: 271
Joined: Nov 2012
City: Wilsonville
State, Province, Country: OR
Darn...OK thanks Terry. I will see what I can find.
Users browsing this thread: 25 Guest(s)
|
|
Recent Posts
|
|
An attempt to remove the Field Coil from a G speaker
|
| Gary
I in fact did, on a 38-14, I think, where I had a speaker with the dead coil.
Well...it kinda worked. Kinda, be...morzh — 10:38 PM |
|
An attempt to remove the Field Coil from a G speaker
|
| Mike, what ever happened to that plan you had to try using a rare earth magnet to magnetize the pole? This looks like a...GarySP — 10:25 PM |
|
RCA T62 is playing.....
|
| Beautiful set.morzh — 09:07 PM |
|
An attempt to remove the Field Coil from a G speaker
|
| Well....here it is.
The green stuff. Unfortunately, probably penetrates deep.
I opened the top layer and saw that:
...morzh — 08:58 PM |
|
Philco 91 Restore Code ??
|
| :clap: :clap: :clap: :clap:
Really nice workmanship!!! Top of the chassis looks great.
Sorry about the long winded e...MrFixr55 — 08:09 PM |
|
Philco 40-120C Restoration
|
| Thank you for your reply. I will check voltages on the other tubes, look at resistor 23 and cap 25, etc. If all else fai...bluecap — 07:58 PM |
|
RCA T62 is playing.....
|
| Nice looking set great save. DavidDavid — 07:48 PM |
|
Philco 89 indicator light.
|
| Hello Jim, I have done several 89s. The trick is to move the drum in or out on it's shaft. You will need to loosen a set...dconant — 07:36 PM |
|
An attempt to remove the Field Coil from a G speaker
|
| MrFixr
Yes, it is my plan to go with 45rpm spider if I go that far.
No, the pole was not left-handed as I unscrewed ...morzh — 07:14 PM |
|
Philco 40-120C Restoration
|
| Change the tube. Check the tube's bias network.
Are any other tubes experience the drop or just this?`
Is resistor 23 OK...morzh — 07:09 PM |
|
Who's Online
|
There are currently 7189 online users. [Complete List]
» 1 Member(s) | 7188 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
