-Builder] Midland 13-509
There was a time when the ol’ Midland 13-509 mobiles made good radios
from which to build a 220Mhz amateur repeater. I have a 13-509 for
sale in excellent condition and in the original box. Included is the
manual, mounting bracket, and mic. Has several pairs
There was a time when the ol' Midland 13-509 mobiles made good radios from
which to build a 220Mhz amateur repeater. I have a 13-509 for sale in
excellent condition and in the original box. Included is the manual,
mounting bracket, and mic. Has several pairs of crystals already installed.
Asking
The Midland 13-509 is spoken for.
Thanks all,
Gary
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Gary
Sent: Friday, November 27, 2009 1:38 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Midland 13-509
Anyone needing an original owners guide for the Midland 13-509, email me
offline.
Bruce
K7IJ
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Per the Subject Line... I've created a Midland, Clegg and Cobra
220 Radio Repeater Conversion folder in the Group Photos section
if you'd like to see how two different conversions were done.
There is a description text in the group files section for the
s13-509 conversion repeater pictures.
Dave,
Keep in mind that the Midland 13-509 was built for the Amateur Radio market,
and the transmit crystals are only specified to maintain .001%, which is 10
PPM. There is no temperature compensation in the crystal circuit, and you
may make the drift worse by using an NPO capacitor. If you
At 5/22/2006 10:48, you wrote:
Working on my midland 220 box, with new international crystals.
Crystals are standard delivery, not rushed, so they should be pretty
stable. They always are in my other rigs...
Question: Is it worth swapping out the fixed value cap that is
paralleled across the
At 5/23/2006 07:20, you wrote:
One other thing you might try - tape a 100 ohm 1 watt resistor to the
side of the crystal and put 12 VDC across it. Not a pretty sight, and
If you're going to heat the crystal, might as well use something that will
keep it at a more or less stable temperature: a
Or use a Motorola crystal oven @ 85 degrees C ...
Neil - WA6KLA
Original Message
From: [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] midland 13-509 tx freq stability...
cap change?
Date: Tue, 23 May 2006 08:43:33 -0700
At 5/23/2006 07:20
I bought a used 220 Maggiore Repeater a number of years ago and it had this
setup for xtal. temp. control on both the TX and RX xtals. Not sure the
manufacturer of the thermistors, but they look like what Bob is describing.
Roger W5RD
If you're going to heat the crystal, might as well use
:51 AM
Subject: Re: [Repeater-Builder] midland 13-509 tx freq stability... cap change?
Or use a Motorola crystal oven @ 85 degrees C ...
Neil - WA6KLA
Original Message
From: [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] midland 13
At 5/23/2006 02:06 PM, you wrote:
If you decide to use an 85 deg C oven, you must get the crystal cut for
that temperature.
Yes, I've noticed some short-term aging problems with crystals run at 50
C. In one case the crystal was held at 35 C for a couple of years, then
sat on the shelf for a
Subject: Re: [Repeater-Builder] midland 13-509 tx freq stability...
capchange?
Date: Tue, 23 May 2006 17:00:21 -0700
At 5/23/2006 02:06 PM, you wrote:
If you decide to use an 85 deg C oven, you must get the crystal cut
for
that temperature.
Yes, I've noticed some short-term aging problems
At 5/23/2006 05:20 PM, you wrote:
I have found the Motorola 85 degree C gold oven to be quite
stable - the earlier black 65 degree C oven wasn't.
Stability wasn't an issue in this case. I was using a temperature
controller with feedback; the sensor on the crystal was held within +/- 0.2
Working on my midland 220 box, with new international crystals.
Crystals are standard delivery, not rushed, so they should be pretty
stable. They always are in my other rigs...
Question: Is it worth swapping out the fixed value cap that is
paralleled across the ceramic trimmer on the transmit
PROTECTED] On Behalf Of na6df
Sent: Monday, May 22, 2006 10:48 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Norton AntiSpam] [Repeater-Builder] midland 13-509 tx freq
stability... cap change?
Working on my midland 220 box, with new international crystals.
Crystals are standard delivery
At 07:39 AM 7/29/05, you wrote:
w8qpo wrote:
hello,
anybody have details of converting midland 13-509 220mhz radio to
repeater? I would like to split rec and tx.
thanks brad w8qpo
K1IKE posted this here in June:
http://6mt.com/222tech.htm
It looks like everything is there you would
hello,
anybody have details of converting midland 13-509 220mhz radio to
repeater? I would like to split rec and tx.
thanks brad w8qpo
Yahoo! Groups Links
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w8qpo wrote:
hello,
anybody have details of converting midland 13-509 220mhz radio to
repeater? I would like to split rec and tx.
thanks brad w8qpo
K1IKE posted this here in June:
http://6mt.com/222tech.htm
It looks like everything is there you would need. Remember Clegg and
Cobra also
- Original Message -
From: w8qpo [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Friday, July 29, 2005 1:13 AM
Subject: [Repeater-Builder] midland 13-509 220mhz to convert to repeater
hello,
anybody have details of converting midland 13-509 220mhz radio to
repeater? I would like
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