RF interference issue again (esp. for E Drucker and Jim Weir and other RF wizards)

You can stop playing with 10.7 as a source of the problem. I cannot recall an
aircraft navcom using 10.7 as the IF frequency.

Jim


"Paul Sengupta"
shared these priceless pearls of wisdom:

-Bear in mind that the radios involved may have different front
-ends. It might just be a coincidence that your handheld and
-panel radios are affected and nothing to do with the airframe.
-
-How about 127.00-10.7 (IF mixer) = 116.30
-116.30/2 = 58.15?
-(i.e. mixing of the second harmonic of 58.15MHz)
-
-Ok, unlikely, just playing with numbers!
-
-Paul
-G1YJY
-
-"Snowbird" wrote in message
. com...
- Update: I talked to a local DE who is also doing piles of
- instrument instruction. She says she's flying in beaucoup
- planes in that area, without the same problem.
-

Jim Weir (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST Pres. Cyberchapter EAA Tech. Counselor
http://www.rst-engr.com

Ah, ok, thanks for that! What do they use? Is it standard?

Paul

"Jim Weir" wrote in message
...
You can stop playing with 10.7 as a source of the problem. I cannot
recall an
aircraft navcom using 10.7 as the IF frequency.

Nope. They are all over the map. I chose a random book from the library...it
happens to be the King KX-170B. The high COM IF is 9.0M and the low COM IF is
861.25k. The high NAV IF is 15.1875M and the low NAV IF is 1.1857M. I could
pick half a dozen books from the shelf and no two would be the same.

Jim


"Paul Sengupta"
shared these priceless pearls of wisdom:

-Ah, ok, thanks for that! What do they use? Is it standard?
-
-Paul
-
-"Jim Weir" wrote in message
.. .
- You can stop playing with 10.7 as a source of the problem. I cannot
-recall an
- aircraft navcom using 10.7 as the IF frequency.
-

Jim Weir (A&P/IA, CFI, & other good alphabet soup)
VP Eng RST Pres. Cyberchapter EAA Tech. Counselor
http://www.rst-engr.com

Blimey, thanks. Any idea how they decide to use these figures? Just out of
curiosity.

Paul

"Jim Weir" wrote in message
...
Nope. They are all over the map. I chose a random book from the
library...it
happens to be the King KX-170B. The high COM IF is 9.0M and the low COM
IF is
861.25k. The high NAV IF is 15.1875M and the low NAV IF is 1.1857M. I
could
pick half a dozen books from the shelf and no two would be the same.