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Repeater question

Sep 23rd 2015, 00:25

K9DBX

Joined: Sep 4th 2015, 01:42
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Hello, new ham with a quick question on repeaters: if I have 2 HT's, one is setup to transmit 147.330 +.600 tone of 100.0 hz (as required by repeater I am trying), and I have headphones on with the second HT listening to 147.330, shouldn't I hear my own transmission at the same time? All I get is the repeater coming back to identify itself after I release the PTT. What am I missing here?
Sep 23rd 2015, 01:23

W1VT

Joined: Apr 4th 1998, 00:00
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Total Posts: 0

It is likely that the HT used for reception is being overloaded--it may not be able to demodulate such a loud signal. You might try moving the 2nd HT farther away.

Zack Lau W1VT
ARRL Senior Lab Engineer
Sep 23rd 2015, 01:33

K9DBX

Joined: Sep 4th 2015, 01:42
Total Topics: 0
Total Posts: 0
That makes sense. It may kill my idea of having the two together on a tripod mount with my dual band Arrow antenna for satellite work.

Michael k9dbx
Sep 24th 2015, 15:13

K9DBX

Joined: Sep 4th 2015, 01:42
Total Topics: 0
Total Posts: 0
I have read about people using 2 radios with satellites, one for transmit, one for receive, isn't that the same thing I am trying to do with 2 radios and local repeater? Listening on .330, transmitting on .930? Why would my listening radio on .330 be trying to de-mod the .930 transmitting freq?



Sep 24th 2015, 16:24

W1VT

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
Satellites use two different bands so that RF filtering can be employed to knock down the unwanted filtering. But, in practice, many HTs lack the filtering and proper design to actually do full duplex. One HT that can is the Icom IC-W32A--but this HT was expensive and has been out of production for many years. The 1997 Product Review lists the MSRP at $479. The typical selling price was $407.

http://forums.radioreference.com/amateur-radio-equipment/309513-looking-handheld-full-duplex-capabity-decent-front-end-display.html

Zack Lau W1VT
Sep 25th 2015, 01:24

WA0CBW

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
Some satellites also use different bands for uplink and downlink (VHF/UHF).
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