The Fisher 440-T FM Receiver
Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand
State, Province, Country: Indiana
Thanks, Mondial. One more question - it appears that most LEDs I have seen have a forward voltage of 2 to 2.2V at a current of 20 mA. Does the 1.5K resistor drop the voltage from 23V to 2V, or from 15V to 2V? Ohm's Law indicates that it is more in the neighborhood of 23V to 2V, is this correct?
I'm just trying to make sure I understand all of this...as I plan to utilize what I learn in replacing the Stereo Beacon bulb with an LED in my 440-T in other vintage Fisher and other receivers later on.
--
Ron Ramirez
Ferdinand IN
Messages In This Thread
RE: The Fisher 440-T FM Receiver - by Ron Ramirez - 03-04-2014, 10:53 AM
Users browsing this thread: 1 Guest(s)
|
|
Recent Posts
|
|
Philco 42-345 Restoration/Repair
|
| Yes, 57 is an electrolytic cap that should be 12 mfd 400 volts according to the parts list from the Phorum library schem...RodB — 06:01 PM |
|
Philco 42-345 Restoration/Repair
|
| Looks like if I am reading it correctly it looks like the silver capacitor#57 that appears to be a replacement is of a l...osanders0311 — 05:09 PM |
|
Philco model 38 code 121 not receiving signal.
|
| Thanks Arran. Yeah this plastic is pretty thin. It's a little thinner than the original stuff. It kinda reminds me of p...Stormlord5500 — 04:37 PM |
|
Testing a speaker and output transformer Trutone A2-G
|
| The equivalent of one short turn is basically the same as that of a shorted load.
If it is the primary's turn, then the ...morzh — 03:53 PM |
|
Testing a speaker and output transformer Trutone A2-G
|
| I've never had an output transformer become shorted, the failure mode is usually an open primary, or in a center tapped ...Arran — 03:52 PM |
|
Philco model 38 code 121 not receiving signal.
|
| As long as the plastic sheeting isn't too thick, I think that the thickness of photographic film would be just about rig...Arran — 03:19 PM |
|
Philco model 38 code 121 not receiving signal.
|
| Well why not! :lol:Stormlord5500 — 03:14 PM |
|
Philco model 38 code 121 not receiving signal.
|
| Good luck next thing you know you will be winding coils just for the fun of it. DavidDavid — 11:29 AM |
|
Testing a speaker and output transformer Trutone A2-G
|
| morzh
Short-circuited turns can be considered as a half-dead transformer.
But on this case transformer will hot and s...Vlad95 — 11:01 AM |
|
Testing a speaker and output transformer Trutone A2-G
|
| I am not sure how a transformer could be weak. It could be inadequate, but only when you replace the original with somet...morzh — 09:56 AM |
|
Who's Online
|
There are currently 2177 online users. [Complete List]
» 4 Member(s) | 2173 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
