| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1425.1 | | HANNAH::REITH | Jim HANNAH:: Reith DSG1/2E6 235-8039 | Tue May 19 1992 16:17 | 8 |
| I've flown a JR Max6 with an FM Rx on ch26 at the field without incident. I DON'T
like the idea of doubling the antenna back. You're effectively cutting the length
off. I'd check for continuity the length of the antenna. You might have "stretched"
the wire a bit in the past. How's the radio rangecheck with the antenna down?
I'd also check for binding of the linkage at extreme deflections.
If it continues to happen, I'd send the radio in. Should still be under warrenty
(until you open it yourself...)
|
| 1425.2 | Disconcerting problem | QUIVER::WALTER | | Tue May 19 1992 17:05 | 11 |
| I was flying it both times when it appeared to stop responding. In each
instance, I got full control back within about 2 seconds. We
immediately ranged checked it with the antenna down and got excellent
results. What's also weird is that both times the plane was relatively
close to us, and there had been no problem when it was further away.
It acts like an intermittant problem, such as a broken antenna wire.
Earle is going to check the antenna tonight.
Dave
|
| 1425.3 | Fix or Crash | LEDS::WATT | | Tue May 19 1992 17:43 | 8 |
| If you're just getting full elevator travel and not rudder, it could be
an intermittant servo pot or a broken servo wire. I would try taping
on the receiver and servos and see if you can get it to act up on the
ground. I have seen a bad servo plug connection do this also. Do you
know if the rudder was responding when the elevator was not?
Charlie
|
| 1425.4 | Battery connection?? | RCFLYR::CAVANAGH | Jim Cavanagh SHR1-3/R20 Dtn:237-2252 | Wed May 20 1992 10:22 | 16 |
|
What about a bad battery connection? You could give it up elevator and
then have the power cut from the rcvr...this would lock the elevator in that
position until power comes back (connection improves). The next time it
could be the rudder. If it happens during level flight or when you not
stirring the sticks you might not notice it.
Just a thought.......
Jim
|
| 1425.5 | Maybe if I ignore it, it'll go away? | VSSCAD::WATTS6::TIMMONS | | Wed May 20 1992 12:40 | 9 |
| re .4 and .all I do plan to check ALL wiring from battery, thru switch
to rec'vr and out to ant. Set is under warrantee so I don't want to
tamper so it's obvious. I did check transmitter last night and found
its' antenna was fairly loose on mount. It appeared to be still
attached to the stud somewhat that is soldered to the main PC board.
Don't think RF would be affected much. PC board soldering looked good
under 3X lupe. (Boy, I hate intermittents. I repair Stereos and VCR's
but those intermittents only cause loss of sound or picture, not 3
months of labor! :^(
|
| 1425.6 | I think paging hits | KAY::FISHER | The higher, the fewer | Wed May 20 1992 16:03 | 14 |
| My guess is that it is a paging system hit.
I know Jim said he flys on 26 but that is a JR ABC&W
receiver and perhaps they are superior at rejecting adjacent
channel interference. The biggest reason I'm willing
to think it is a beeper is the duration - seems random
and only lasts a few seconds.
Beep Beep Beep - Doctor Howard to emergency!
Bye --+--
Kay R. Fisher |
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| 1425.7 | Possible - Can You Check? | LEDS::WATT | | Thu May 21 1992 13:47 | 6 |
| Pager hits shouldn't affect narrow band receivers unless they are very
strong and happen to be on the adjacent frequency. Kay, don't you have
a scanner for checking such things?
Charlie
|
| 1425.8 | Like to look at the spectrum | KAY::FISHER | The higher, the fewer | Fri May 22 1992 13:03 | 32 |
| > <<< Note 1425.7 by LEDS::WATT >>>
> -< Possible - Can You Check? >-
>
> Pager hits shouldn't affect narrow band receivers unless they are very
> strong and happen to be on the adjacent frequency. Kay, don't you have
> a scanner for checking such things?
>
> Charlie
I know - but there is an antenna farm just across the street from Acton - North Side of Route 2
slightly West.
I used to but I traded it a few months ago for a large console size SWL rig that doesn't
pick up frequencies above 30 Mhz.
I think Earl is going to take the radio back to the local hobby shop he got it from
and have them replace it with an entire new rig on a new frequency. That should
eliminate the problem whatever it was.
But I wouldn't mind spending a few afternoons at Acton watching a scanner.
My preference would be one of the new portable LCD spectrum analyzers like
Ken Baker had at the Down East Soaring Club glider contests. Maybe it is
time to call our district representative.
Bye --+--
Kay R. Fisher |
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| 1425.9 | Calling Dr. Howard,Dr. Fine,Dr. Howard | VSSCAD::WATTS6::TIMMONS | | Mon Jun 01 1992 11:47 | 18 |
| Last Friday, the following Pagers were observed at the Acton field
during a noontime flying session by Bob Wolf, a long time
Deccie/ham/videophile/audiophile/Cherokee owner/pilot (the full
sizecarries4realpeople kind/former rc w/rubber escapement pilot and
best damn power supply engineer.
Thanks to Bob for bringing along his scanner.
Freq. Channel
72.34mhz 27.5
72.66mhz 43.5
72.68mhz 44.5
72.72mhz 46.5
72.84mhz 52.5
72.92mhz 56.5
72.06mhz 13.5
72.56mhz 38.5
No relative field strength was measured.
|
| 1425.10 | Maybe this explain why I keep getting glitches at the Acton field | OLCROW::PHILLIPS | DECtp Engineering TAY1-2 DTN 227-4314 | Thu Oct 08 1992 13:34 | 29 |
| re .9
>> Thanks to Bob for bringing along his scanner.
>>
>> Freq. Channel
>> 72.34mhz 27.5
>> 72.66mhz 43.5
>> 72.68mhz 44.5
>> 72.72mhz 46.5
>> 72.84mhz 52.5
>> 72.92mhz 56.5
>> 72.06mhz 13.5
>> 72.56mhz 38.5
>>
>> No relative field strength was measured.
The past few times I've flown my Spirit at the Acton field, I've experienced
"hits" on my RCD RX(ch 27.) Most of them have been very minor(lasting less than
a second), but still concern me. Several times yesterday as I flew the plane by
me, I could see it sort of porposing up and down. As the plane went by, I could
see the flaps droping about 1/4 down and then going back up(I wasn't touching
the flap stick!!!) Other times I'd be making a nice flat turn, and all of a
sudden she'd drop a wing tip and head straight down(it wasn't a tip stall.)
I never had this problem with the RX last year or earlier in the spring. I also
didn't have a problem with the RX this past Sunday at Al Ryder's contest. Could
it be that the pager on 72.34(ch 27.5) is using a tad more power than it should?
Can the AMA or FCC do anything about this if it is true?
-Lamar
|
| 1425.11 | | HANNAH::REITH | Jim HANNAH:: Reith DSG1/2E6 235-8039 | Thu Oct 08 1992 13:39 | 2 |
| My understanding is that we're the secondary band users. I hope the FCC
doesn't discover that you were muddying up the pager signal 8^)
|
| 1425.12 | | RCFLYR::CAVANAGH | Jim Cavanagh SHR1-3/R20 237-2252 | Thu Oct 08 1992 14:49 | 10 |
|
Lamar,
It sounds like your rcvr is not rejecting the adjacent signals.
Send it in for a check up.
Jim
|
| 1425.13 | But I didn't have a problem at the contest.... | OLCROW::PHILLIPS | DECtp Engineering TAY1-2 DTN 227-4314 | Thu Oct 08 1992 15:27 | 10 |
|
Jim,
I never had a problem(no glitches at all) at the contest on Sunday. There
were as many as 8 planes in the air at one time. I know I flew one flight at
the same time with guys on ch 26 and 29. No problems at all. I've only had
problems with this receiver at Acton. I'll try another RCD RX and my JR RX
(both on 27) and see what happens. Thanks for the tip anyway!
-Lamar
|