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Re: help with antenna
I think the whip antenna is for mobile,I suggest to get an aerial antenna even an omni type and of course the impedance is 50 ohms and try this antenna a cushcruft the model s ringo ranger 2, it is tunable antenna,I already test it from 2001 up to present,its working fine...
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There are two mailing lists on Yahoogroups.com that cover Midland LMR radios..one is for the technical discussion (with files also) and the other has only manuals in the FILES area (no discussion on that one)...Cant recall if the 2104B is there but Im sure one of the users would have it..I'll ask and see...
What you need is at the VERY least is a Ni-Cd battery pack with 600mA/hr rating. We have an HH-300, with a configuration of 4AAx2.
Interstate Batteries has the BEST price I could find, although when we bought the HH-300, I sent it to SiTex for a new battery AND a tune-up which cost around $100. Here's the link to the Interstate battery website. <a href="http://www.interstatebatteries.com/cs_eStore/Products/RT/PID-NIC0068(Other+Products).aspx?dsNavigation=Ntk%7eSearchGroup%7cSitex+HH%2f-250%7c3%7c%2cNy%7eTrue%2cNtpc%7eDisabled%2cNs%7eproduct+Type%7c101%7c1%7c&Title=9.6V+800mAh+NiCd">http://www.interstatebatteries.com/cs_eStore/Products/RT/PID-NIC0068(Other+Products).aspx?dsNavigation=Ntk%7eSearchGroup%7cSitex+HH%2f-250%7c3%7c%2cNy%7eTrue%2cNtpc%7eDisabled%2cNs%7eproduct+Type%7c101%7c1%7c&Title=9.6V+800mAh+NiCd</a>
Hope this helps.
(EDIT) Do NOT forget that these radios are wired center pin negative! (Don't ask how I found this out...)
It is not typical but neither is there a problem with the radio.
Transmit Power output is loosely dependent on the:
1. Frequency or channel you are transmitting. Normally, Marine Band VHF are calibrated for max (25 in your radio) at Ch16 or 156.800Mhz;
2. If the SWR of the antenna is not a flat 1.0, power tends to go down;
3. After some time, the TX side of the radio needs to be re-calibrated;
4. Power Supply - some radios will push max output only when powered with 13.8 and tends to go down when used with 12 volts.
Hope this be of some help/idea. Post back should you need additional information.
Good luck and kind regards.