It's model name was RP3A if I am not mistaken, made originally for the MVP
mobile to turn it into a repeater. It was built to replace the factory cg
board. It has no remote control or cw functions. Just repeat audio control
and carrier control. It used a comm spec TS32 for encode and decode.
I personally do not like LMR cable in repeater installations. We had a lot of
trouble at work with LMR cable being used in duplexed service. Inside the
cabinet, this may not be an issue where the cable only carries the receive or
only the transmit signal. The problem seems to arise when you
Doug Bade wrote:
It's model name was RP3A if I am not mistaken, made originally for the MVP
mobile to turn it into a repeater. It was built to replace the factory cg
board. It has no remote control or cw functions. Just repeat audio control
and carrier control. It used a comm spec TS32 for
At 05:33 AM 4/11/2005, Joe wrote:
I personally do not like LMR cable in repeater installations. We
had a lot of trouble at work with LMR cable being used in duplexed
service. Inside the cabinet, this may not be an issue where the
cable only carries the receive or only the transmit signal.
You'd need the KCT option cable installed along with
the two jumper/resistors reconfigured inside the
radio(s). [the jumper/resistor move is a true test
of your eyesight and hand skills]
Program setup depends on your external controller or
tone panel.
Power would have to be reduced in
Power would have to be reduced in lock to talk
(repeater) applications and a decent small blower
across the tx radio
I was cruising through fry's yesterday, and I wondered
Has anyone ever liquid-cooled a repeater?
The Koolance Exos system looks pretty easy to apply, the only hard
part
That's an interesting device for a computer but I wonder why anyone
would go to all that trouble (except for fun of course) when you can
easily cool a Mastr II continuous duty PA with the same number of fans
and it'll run cool and comfortable forever. For the price you'd pay for
that water
Actually, yes.. this may be difficult to describe.. but here goes.
We took a solid-state amplifier used for a 2.4GHz ATV repeater, and wound
copper tubing through the existing cooling fins of the heatsink material.
The copper tubing was just the correct size to make a firm press-fit
between
looking for poop on
trielectric amp
a4090mbr
freq range ( appears uhf)
mdm ted
Ted Bleiman K9MDM
MDM Radio Ltd - 1629-B N. 31 st Ave Melrose Park, IL 60160 708.681.0300 fax 708.681.9800 web http://www.mdmradio.com -
Check it now!!
Do you Yahoo!?
Yahoo! Small Business - Try our new
Hi, does anyone have any information, or schematic,
for a Midland VHF repeater PA (Part #70-3300A). Its
rated at 70watts output (using 2 MRF647's). Power
output is adjusted by a earlier stage (Mitsubishi
C1946), but I can't trace it's biasing circuit without
tearing the unit apart..
Thanx
Hi Andrew,
I'm just back from the IWCE Convention in
Vegas (cough! cough!)...
Anyway, Midland is alive and well at least
with a large booth and nice diplays. If you
can't find what you need from the group,
there's a chance you might find it direct
from Midland. If you can't find them on
At 4/10/2005 05:54 PM, you wrote:
At 04:20 PM 4/10/05, you wrote:
Hi all
Does anyone know if a dual band antenna for 144/220 is available. .
If so who makes it?
Thanks in advance
Mike
Mobile, base or mountaintop repeater (i.e. bad weather) ?
Mobile, well, take your pick.
Base, look
Andrew Jones [EMAIL PROTECTED] wrote:
Hi, does anyone have any information, or schematic,
for a Midland VHF repeater PA (Part #70-3300A). Its
rated at 70watts output (using 2 MRF647's). Power
output is adjusted by a earlier stage (Mitsubishi
C1946), but I can't trace it's biasing circuit
I've got a Wacom WP-643 (6 cavities) that I've been thinking about
selling. Excellent condition. Not too thrilled about packing and
shipping it so local pick up only. Located in Central Massachusetts.
Contact me directly if anyone is interested.
- Rob
Spec sheet:
Anyone have experience with Standard Crystal?
(http://www.standardcrystalcorp.com/)
I was just quoted $20 for a pair of crystals (RX and TX) for a bunch of
UHF portables I have. Just wondering if anyone had any issues with them.
- Rob
Yahoo! Groups Links
* To visit your group on the
As to that heavier Heat shrink some Electrical supply places HD truck
dealerships sell the short sleeves . the el cheapos at discount places are
not worth a tin hoot .. 3M makes really good stuff places like NAPA is
one source for #12 ball park shrink, maybe the HD Truck places the Rice
Anyone have info. who would buy up the PL or CTCSS
boards for Standard / Heathkit and other parts ?, I know this is off subject but
thought to ask.
Mark Holman[EMAIL PROTECTED]http://www.ab8ru.org --- My New Web Site
03/31/2005
Yahoo! Groups Links
To visit your group on
I seen in a computer mag called Maximum PC a article on a liquid cooled PC ,
I do know your RF Amp on Broadcast Gear has a cooling pump, but I like that
idea of a pumpless cooling system, I think if someone wanted to experiment
with the same technology as a Solar heating system, maybe some
At 06:31 PM 4/11/2005, Mark Holman wrote:
I seen in a computer mag called Maximum PC a article on a liquid cooled PC ,
I do know your RF Amp on Broadcast Gear has a cooling pump, but I like that
idea of a pumpless cooling system, I think if someone wanted to experiment
with the same technology
If you wan't to play with water cooling a radio I would recommend a few things.
The bigest problem would be the water to radio interface (water
block). If this was me, I would take a MASTR-II mobile, and remove
the heatsink assembly. Then sand blast the paint off it. And
interface a 1/2 copper
For tubing go with anything that is Tygon. I have had problems with
the standard Clear Flex 60 . Thick wall (1/8) resists kinks, but
standard wall is eaisier to work with. Hose clamp everything,
thighten the clamps tell your knucles hurt and then put an extra turn
in there. I have killed a
Not before checking reactivity to the plastics.
I'd rather stick with plain water, it's a known quantity.
True. I know there is a kid that is running pure CLR in his system.
But he can't over clock much cause it is a cheap off the shelf cooler
with 1/4 tubing.
Pity the RC-210 doesn't have
Rob,
I just posted a message the other day that I had found them after not seeing
anything on them for a long time. We used them at the two way shop years
ago and they were great. I am thinking about giving them my business. One
thing, don't try MH Electronics in California. I used them on a
At 01:46 PM 4/11/05, you wrote:
Andrew Jones [EMAIL PROTECTED] wrote:
Hi, does anyone have any information, or schematic,
for a Midland VHF repeater PA (Part #70-3300A). Its
rated at 70watts output (using 2 MRF647's). Power
output is adjusted by a earlier stage (Mitsubishi
C1946), but
I have a surpluse [80+] of Motorola # TDE7230A made by Decibel
Products, mod# DB404[406-420MHz.]
All antennas are new in box with test spec sheet,including N male
termination and mounting hardware.
These antennas list for $343 each. Reasonable offers considered.
Referrals to interested
RE: 406-420MHz.
Hi -- The last few I sold for $195 + $50 UPS to most places [large ,
heavy box. Here is a link the may have more info for you.
http://www.andrew.com/products/antennas/bsa/results.aspx?
modnum=db404
I would like to find a new home for these
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