Posts: 182
Threads: 5
Joined: Feb 2017
City: Cedar Rapids Iowa
(03-30-2017, 12:00 PM)morzh Wrote: Shielded cables in this particular case do not have to be of particular impedance.
Impedance only matters when your transmission length becomes comparable or especially when it exceeds the wavelength at which point it is considered a resistor equal to the characteristic impedance as seen by the source; otherwise your cable acts as lumped capacitance/inductance as seen by the source, and your shield is there exactly for that - to provide shielding.
Thanks morzh! I decided this was probably the case and bought some of this from Digi-Key: https://www.digikey.com/product-detail/e...ND/5270188
Rich
Messages In This Thread
RE: My 47-1230 Restoration - by criageek - 03-30-2017, 12:12 PM
Users browsing this thread: 50 Guest(s)
|
|
Recent Posts
|
|
Philco 49-1040
|
| Hello bob,
that underside looks like it is all original !
Sincerely Richardradiorich — 02:07 AM |
|
Philco 49-1040
|
| Oh yes, many bumblebees and loktal tubes.
The cutout is for the speaker. Here's a photo from a different set.
Bob Andersen — 12:59 AM |
|
Philco 49-1040
|
| Bob;
Looks like another "Bumble Bee" special, like my Brand Z T.O radios. Is that section they took out of ...Arran — 12:19 AM |
|
Philco 49-1040
|
| Hello Bob,
You are like the home for lost tv's like how people bring pets home !
Sincerely Richardradiorich — 12:00 AM |
|
Philco 49-1040
|
| I thought I had an arrangement to restore this set for a customer but his wife said heck no. Instead, he gave it to me....Bob Andersen — 10:29 PM |
|
Philco 46-480 Electronic Restoration
|
| I kept working on reassembly this week. I wasn’t able to solder for a few days while it was too cold (single digit low t...jrblasde — 09:27 PM |
|
Atwater-Kent 84, restoration.
|
| Well, powering it up would be too good to be true, and I had that feeling.
Before I did, I decided to check the coils...morzh — 06:02 PM |
|
An attempt to remove the Field Coil from a G speaker
|
| Thanks Chas,
sure will give it a look!morzh — 03:39 PM |
|
An attempt to remove the Field Coil from a G speaker
|
| Mike,
Lookup murrayatuptown on ARF. Seems he has a dilemma with surplus field coils. Could get lucky and have what y...Chas — 01:26 PM |
|
Atwater-Kent 84, restoration.
|
| Hello Mike,
I have not checked to see if my console has a fuse or not and far as sets go I have early 30s General Motor...radiorich — 11:25 AM |
|
Who's Online
|
| There are currently no members online. |
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
