There are some extremely broadband linear amps you can find on Ebay
and such that amplify up to 1w from dc to 1ghz with 30-40db gain
which can be driven off the gen port of your monitor for extra
dynamic range. Calibration obviously goes, but when you are trying to
see the bottom of the range,
Subject: Re: [Repeater-Builder] Re: Old duplexer tuning question
New cables will be a lot more flexible, and with
RG214's double shield, they should work better too.
It's tempting to use the coax and TEE fitting as a
handle when picking the unit up - don't do that !
I found that the connectors
I'm assuming that if the old RG-8 cables are being replaced
with RG-214 cables that are the same length, that the
velocity factors of both types of cable are the same.
Yep, 66%. Unless it's RG-8 foam, but I'm 99% sure that PD used regular
solid dielectric RG-8.
--- Jeff
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Old duplexer
tuning question
New cables will be a lot more flexible, and with
RG214's double shield, they should work better too.
It's tempting to use the coax and TEE fitting as a
handle when picking the unit up - don't do
Tony:
If you are dealing with a bandpass-band reject duplexer, it is usually
true that notches will move with the pass cavity. The pass cavity will
tune very broad and the notches tune very sharp. Trying to line up
all the notches is difficult. Tuning the pass is easier.
One technique I
A little spot of hot pink nail polish on the shaft/nut joint will tell you if
someone tried to tweak the cans a little..Joe
skipp025 [EMAIL PROTECTED] wrote:
Once you get the notches in line... firmly secure the
notch position adjustment screws and threaten people
with early
tony dinkel [EMAIL PROTECTED] wrote:
I also think my problem with the notches is that I do not have enough
dynamic range on my ifr 1600 to see the bottom.
I can't see the bottom on my IFR1500, so I center the sides of the notch that I
can see on the center frequency. I figure that the
New cables will be a lot more flexible, and with
RG214's double shield, they should work better too.
It's tempting to use the coax and TEE fitting as a
handle when picking the unit up - don't do that !
I found that the connectors added exactly 1/2 inch to
the cable length PER CONNECTOR, so you
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