Sent: Wednesday, February 17, 2010 5:33 PM
Subject: Re: [Repeater-Builder] Bend an ICOM a little further
Seriously, some people need to read the original message before replying.
The original complaint was running out of tunning range on the piston trimmer
in the channel element
Yeah, I could see that. He did not specify the crystal manufacture, plus the
factory compensated the element to what crystal was originally in it.
I just got some Bomar crystals (Not my choice) for the clubs UHF Micor. The
TX was off 14 to 39 kHz, Had to add a 10pF cap to get the trimmer in the
-
From: DCFluX
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, February 18, 2010 2:20 AM
Subject: Re: [Repeater-Builder] Bend an ICOM a little further
I just got some Bomar crystals (Not my choice) for the clubs UHF Micor. The
TX was off 14 to 39 kHz, Had to add a 10pF cap
)
- Original Message -
From: Paul Plack
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, February 18, 2010 4:41 AM
Subject: Re: [Repeater-Builder] Bend an ICOM a little further
There used to be a great little company in the Toronto area called Lesmith
that did a nice job
I just got some Bomar crystals (Not my choice) for the clubs
UHF Micor. The TX was off 14 to 39 kHz, Had to add a 10pF cap
to get the trimmer in the center range. Strangely the RX was fine.
That's probably not indicitive of Bomar making a bad rock; you almost always
have to change out the
You can do it but depending on the quality of the Parts you use it will
drift. When You have it on the test bench and add caps Etc.. and it reads
right on Freq , unless it is going to be within a few deg it will drift
and When transmitting things will heat up and it will drift .
I
Was the crystal that you got for 146.06RX made for a MASRTII radio, or
something else? The cut can be different for different radio manufacturers.
I have purchased only crystals for MASTRII and recrystalled my ICOMs
with good luck. If I need to net them on frequency I use capacitors
from the
Jared;
You need to warp 4khz not 400hz... If they were made up for 146.01 I
would assume that they can do that. So now we need to look at why they
are not... 10v reg power supply needs to be 10v +/- .1-.2v . The temp
comp line to the EC needs to be driven to something by a 5ppm or eq
channel
@yahoogroups.com
Sent: Tuesday, February 16, 2010 9:57 PM
Subject: [Repeater-Builder] Bend an ICOM a little further
Hey folks,
I'm working on a GE Mastr II high band repeater. Someone gave me some
crystals that were made up for 146.010 RX. I installed one in an EC ICOM and
the best I can
Seriously, some people need to read the original message before replying.
The original complaint was running out of tunning range on the piston
trimmer in the channel element while trying to net the crystal on frequency.
Not rubbering the crystal to another channel or Nuclear warfare on an
At 2/17/2010 16:33, you wrote:
Also I should mention that the receiver should be set by looking at the LO
frequency on either a service monitor or a frequency counter of known
precision, Tuning it until it sounds best is not the way to go. The LO
frequency for the MASTR-II VHF will be either +
Doug wrote:
Jared;
You need to warp 4khz not 400hz... If they were made up for 146.01 I would
assume that they can do that.
Jared wrote:
I just need the crystal to go up a hair more (400 Hz on the crystal freq).
In Jared's defense, he did say on the crystal frequency
He needs
Hey folks,
I'm working on a GE Mastr II high band repeater. Someone gave me some crystals
that were made up for 146.010 RX. I installed one in an EC ICOM and the best I
can adjust for is 146.0064, which sounds really scratchy when I inject a 3k
deviation signal on 146.010. When I tune the
On Feb 16, 2010, at 9:57 PM, KE4ZDG wrote:
Hey folks,
I'm working on a GE Mastr II high band repeater. Someone gave me some
crystals that were made up for 146.010 RX. I installed one in an EC ICOM and
the best I can adjust for is 146.0064, which sounds really scratchy when I
inject a
I think you are referring to not being able to net the rocks to the
correct frequency in your channel element. This is usually due to not
enough or too much capacitance in the oscillator circuit. Good crystal
manufacturers will supply the mid range temperature compensation
capacitor with their
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