FM frequency overlap at 27.0-27.9
-
- G-Private
- Posts: 4
- Joined: Tue Oct 23, 2018 1:02 pm
- Location:
FM frequency overlap at 27.0-27.9
Does the FM frequency overlap on WW2 radios at FM 27.0-27.9 mean that WW2 Armor and Artillery units could communicate with each other directly?
For example, would it be possible for an SCR-508 in an M4 Sherman tuned on FM 27.3 to communicate with a neighboring SCR-610 in an M10 Tank Destroyer tuned to FM 27.3?
For example, would it be possible for an SCR-508 in an M4 Sherman tuned on FM 27.3 to communicate with a neighboring SCR-610 in an M10 Tank Destroyer tuned to FM 27.3?
- John Neuenburg
- Gee Old Hand
- Posts: 3770
- Joined: Mon Mar 24, 2003 11:18 am
- Location: U.S. Left Coast
Re: FM frequency overlap at 27.0-27.9
I'll let a radio expert answer but want to add that the SCR-608 and 628 sets run at 27-38.9 MC. My guess is it's as simple as plugging in crystals between 27 and 27.9 in all sets so one or more of the pushbuttons allow talking to everybody.
But I don't even know enough about these things to be considered dangerous!
But I don't even know enough about these things to be considered dangerous!
Military Vehicle Collectors of California
MVPA 7404
1942 Ford GPW British Special Air Service Regiment Replica
1944 Willys MB
1941 Indian 640
BSA Folding Bicycles
M1942 Command Post Tent
MVPA 7404
1942 Ford GPW British Special Air Service Regiment Replica
1944 Willys MB
1941 Indian 640
BSA Folding Bicycles
M1942 Command Post Tent
-
- G-Private
- Posts: 4
- Joined: Tue Oct 23, 2018 1:02 pm
- Location:
Re: FM frequency overlap at 27.0-27.9
Yes, I agree that it seems possible and likely but am also not an expert. Hopefully someone will confirm that this would or could work. Even better would be some knowledge that this overlap was intentional.
-
- G-Major General
- Posts: 3496
- Joined: Sat Aug 16, 2003 7:55 pm
- Location: Texas
Re: FM frequency overlap at 27.0-27.9
The units overlap only at 27.9
- John Neuenburg
- Gee Old Hand
- Posts: 3770
- Joined: Mon Mar 24, 2003 11:18 am
- Location: U.S. Left Coast
Re: FM frequency overlap at 27.0-27.9
Don't the "tank" radios go 20- 27.9 and the "artillery" radios start at 27? Aren't there crystals between 27 and 27.9?
Related question is are the sets identical otherwise and so would a 20 or 25 MC crystal work in an "artillery" radio?
Military Vehicle Collectors of California
MVPA 7404
1942 Ford GPW British Special Air Service Regiment Replica
1944 Willys MB
1941 Indian 640
BSA Folding Bicycles
M1942 Command Post Tent
MVPA 7404
1942 Ford GPW British Special Air Service Regiment Replica
1944 Willys MB
1941 Indian 640
BSA Folding Bicycles
M1942 Command Post Tent
-
- G-Major General
- Posts: 3496
- Joined: Sat Aug 16, 2003 7:55 pm
- Location: Texas
Re: FM frequency overlap at 27.0-27.9
SCR 508 is 20-27.9.SCR 610 is 27.9-38.5.They ONLY OVERLAP at 27.9.
- YLG80
- G-Lieutenant General
- Posts: 4095
- Joined: Fri Aug 05, 2011 9:45 am
- Location: near Namur, Belgium
- Contact:
Re: FM frequency overlap at 27.0-27.9
I thought that the SCR-610 was covering the 27 Mhz ( not 27.9 MHz) to 38.9 Mhz.
So there would be a frequency range overlap from 27 to 27.9 Mhz with the SCR-508 and complete overlap with the SCR-608.
Yves
Ford GPW 1943 - Louisville - DoD 12-7-43
serial 164794
serial 164794
-
- G-First Lieutenant
- Posts: 637
- Joined: Fri May 23, 2008 12:04 pm
- Location: FRANCE - TOUL