Today's Message Index:
----------------------
1. 12:38 AM - 2 1/4 Indicator for ADF (Mick Muller)
2. 08:09 AM - Re: AeroElectric-List Digest: 1 Msgs - 04/28/11 (larry dodge)
3. 10:15 AM - Re: 2 1/4 Indicator for ADF (Robert L. Nuckolls, III)
4. 04:51 PM - Connectors for small diameter 'coax" wires (Neil Clayton)
5. 05:34 PM - Re: Connectors for small diameter 'coax" wires (ROGER & JEAN CURTIS)
6. 06:38 PM - Re: Jhp 520 PTT cable (Turbo_Boss)
7. 08:56 PM - VM1000 sensor question (DEAN PSIROPOULOS)
8. 10:04 PM - Re: Connectors for small diameter 'coax" wires (Robert L. Nuckolls, III)
Message 1
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Subject: | 2 1/4 Indicator for ADF |
Greetings O Electronic whizzpersons,
I know this is probably a long shot, but here goes.
I have a Collins 650 ADF and antenna in my possession, but no Indicator.
Simple I hear you say, buy an IND-650 Indicator.
My problem is that I have a 2 1/4 inch hole, whereas the IND-650 is a 3.5
inch unit.
Does anyone out there know of a 2/1/4 inch indicator that will work with the
650 ADF.
Mick Muller
Message 2
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Subject: | Re: AeroElectric-List Digest: 1 Msgs - 04/28/11 |
John,=0A-=0AThanks for the pics. I see the water on our steps to dock.-
Boys look like they like each other. =0A-=0ARegards,=0A-=0ALarry=0A=0AF
rom: AeroElectric-List Digest Server <aeroelectric-list@matronics.com>=0ATo
: AeroElectric-List Digest List <aeroelectric-list-digest@matronics.com>=0A
Sent: Friday, April 29, 2011 2:56 AM=0ASubject: AeroElectric-List Digest: 1
Msgs - 04/28/11=0A=0A*=0A=0A===============
===========0A- Online Versions of Today's List Digest
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=====0A=0AToday's complete AeroElectric-List Digest can also be fou
nd in either of the =0Atwo Web Links listed below.- The .html file includ
es the Digest formatted =0Ain HTML for viewing with a web browser and featu
res Hyperlinked Indexes =0Aand Message Navigation.- The .txt file include
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wed with a generic text editor =0Asuch as Notepad or with a web browser.
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u 04/28/11: 1=0A- - - - - ---------------------------------------
-------------------=0A=0A=0AToday's Message Index:=0A----------------------
=0A=0A- - 1. 02:28 PM - Strange radio transmit problems - take 2- (Pe
ter Pengilly)=0A=0A=0A=0A________________________________- Message 1- _
____________________________________=0A=0A=0ATime: 02:28:05 PM PST US=0AFro
m: Peter Pengilly <peter@sportingaero.com>=0ASubject: AeroElectric-List: St
range radio transmit problems - take 2=0A=0A=0AIn June last year I wrote ab
out a problem I was having with the =0Atransmitter in my airplane where the
radio would not transmit on some =0Afrequencies. I wonder if I could again
ask for some advice?=0A=0AI thought I solved the problem by replacing the
radio to antenna coax - =0Abut all I in fact did was shift the frequencies
that were problematic. =0ASince then I have tried several different fixes w
ithout any success. I =0Ahave improved the grounding of the antenna, replac
ed the antenna and =0Atried several different headsets, all with no change
to the problem. I =0Ahave found that on the ground without the engine runni
ng the radio will =0Atransmit on all frequencies (or at least in 1 MHz step
s through the =0Afrequency band). In the air some frequencies cause a probl
em (such as =0A118.9, 125.25 and 127.05), but throttling back to idle somet
imes =0Aproduces an intelligible transmission, although not great. When the
=0Aradio does not transmit it is obvious as no side tone is heard in the
=0Aheadset, sometimes carrier wave only is transmitted.=0A=0AThe voltage re
gulator (PMR-1) for the SD-8 alternator is mounted very =0Aclose ahead of t
he radio, along with the large capacitor and OV thing, =0AI'm now wondering
if there is some kind of electro magnetic interference =0Ahappening? Of co
urse the best check would be to go fly with the =0Aalternator off, and I sh
ould be able to do that over the next few days =0A(there's some wedding goi
ng on here tomorrow that is getting in the way =0Aof everything ...). Assum
ing it is interference, how far away from the =0Aradio should I mount the V
R, is the back side of the firewall a suitable =0Alocation? Should the capa
citor be close the the VR, or doesn't it =0Amatter? Its a Becker AR-4201 ra
dio, Becker say that if it transmits on =0Aany one frequency there is nothi
ng wrong with the radio. Transmit is =0Agood on some frequencies (for examp
le 122.6, 129.8) and receive is =0Aalways strong.=0A=0AThanks for your help
-========================
Message 3
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Subject: | Re: 2 1/4 Indicator for ADF |
At 03:28 AM 4/29/2011, you wrote:
><mmul6471@bigpond.net.au>
>
>Greetings O Electronic whizzpersons,
>I know this is probably a long shot, but here goes.
>I have a Collins 650 ADF and antenna in my possession, but no Indicator.
>Simple I hear you say, buy an IND-650 Indicator.
>My problem is that I have a 2 1/4 inch hole, whereas the IND-650 is
>a 3.5 inch unit.
>Does anyone out there know of a 2/1/4 inch indicator that will work
>with the 650 ADF.
Check yellowpages.com for aifcraft instruments in Wichita, KS.
There's a bunch of folks in the business there. Some have
inventory of vintage instruments. One in particular is
on the east side of the Mid Continent Airport campus who's
name escapes me at the moment. I was in their facility about
10 years ago and they had a warehouse full of yellow-tagged
indicators of all types.
Ask around the list of folks in ICT . . .
Bob . . .
Message 4
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Subject: | Connectors for small diameter 'coax" wires |
I know about the existence of connectors for RG0400-like coax cables, but are there
similar connectors for small diameter wires like 18AWG shielded Tefzel wires?
I hate the resulting "lump" in the wire when I try to connect shield and
core wires using butt-splice connectors, and the shrink-wrap never seems to contract
nicely around the wires afterwards.
Thanks for ideas.
Neil
Message 5
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Subject: | Connectors for small diameter 'coax" wires |
I know about the existence of connectors for RG0400-like coax cables,
but
are there similar connectors for small diameter wires like 18AWG
shielded
Tefzel wires? I hate the resulting "lump" in the wire when I try to
connect
shield and core wires using butt-splice connectors, and the shrink-wrap
never seems to contract nicely around the wires afterwards.
Thanks for ideas.
Neil
If the lump in the wire bothers you, then the best method of
connecting two wires is to solder them, there is a good tutorial in the
Aeroelectric Connection. Be sure to use a shrink tubing size just large
enough to pass over the wires and the soldered connection. If shrink
tubing
of too large size is used, it will, in fact, not shrink down to the wire
for
a nice neat joint.
Roger
Message 6
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Subject: | Re: Jhp 520 PTT cable |
I have a JRC 520 and the external PTT work when you ground it.
Here is the HEADSET and PTT schematics
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=338485#338485
Attachments:
http://forums.matronics.com//files/jrc_500_520_headset_and_ptt_schematics_189.jpg
Message 7
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Subject: | VM1000 sensor question |
Is there anyone who knows the ins and outs of the VM1000 B&W engine monitor
system. When I originally bought mine 10 years ago I ordered it for a
carbureted engine. The engine I finally installed has fuel injection which
has higher fuel pressure than a carb engine.
The VM1000 display shows fuel pressure pegged and flashing at 10 PSI. I
thought that the only thing that might be required to fix this was a
software change but a friend suggested I might need a new sensor with a
higher range as well. Would anybody know about this, did VM use two
different fuel pressure sensors? What brand and model number of sensor were
they? My sensor is a fancy 4 wire unit with a Hirschman connector.
Since VM has been absorbed by JPI my unit is no longer supported (only the
VM1000C units are still supported) and talking with JPI at Sun N Fun
confirmed my suspicions that they bought VM to remove one of their
competitors from the market. That being the case, I obviously can't get a
software update for the DPU but I might be able to recalibrate the unit to
get some useful information by putting a resistor in parallel with the
sensor to have the 0-10 PSI on the display correspond to 0-30 PSI at the
sensor.
Anyone know the guy who invented the VM1000? Does he, or anyone who used to
work at VM, have knowledge, software source code, assemblers, compilers or
PROM burner for the legacy system? Maybe they lurk on the list and could
help with modifying the software to get my pressure display to work
properly? Just a thought, if I had the tools and software I'd be willing to
support this thing for anybody who has one. Thanks.
Dean Psiropoulos
RV-6A N197DM
2.5 years of fun so far
Message 8
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Subject: | Re: Connectors for small diameter 'coax" wires |
At 07:45 PM 4/29/2011, you wrote:
>
>I know about the existence of connectors for RG0400-like coax
>cables, but are there similar connectors for small diameter wires
>like 18AWG shielded Tefzel wires? I hate the resulting "lump" in the
>wire when I try to connect shield and core wires using butt-splice
>connectors, and the shrink-wrap never seems to contract nicely
>around the wires afterwards.
Are you talking about coax connectors? Yes,
virtually every series of connector is available
tailored to a particular coax. The problem is
having tools for crimped connectors.
I've never found it useful to expand the line
of tools for a situation that turns up once every
couple of years. Consider this work-around I published
for another 'coax down sizing' issue some years ago.
http://www.aeroelectric.com/articles/RG58/RG58.html
In years past, I've also 'jeeped' a standard UG88
BNC connector onto a smaller diameter coax and then
potted the wire into the back of the connector with
epoxy.
If you had a hundred of these joints to make, yeah,
go buy the tools and right connectors. If you've got
a couple . . . there are practical work-arounds.
Bob . . .
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