Hi Ray - Thanks for the report.  I operated the PRC-174 for Field Day boonie ops but a similar antenna situation for that man pack set vs optimum antennas.  As a hasty setup I did not deploy my usual low horizontal dipole, just used the whip and a quarter wave ground "radial", it worked pretty well but propagation was excellent on 40 meters that day. (note that the wire dipole antennas for the PRC-74 and PRC-174 are exactly the same unit - reflecting their origins with Hughes Aircraft..)
I also ran the whip tilted downward to enhance NVIS for more regional contacts. That worked very well but really hard to do a real-time A versus B, slant-versus vertical whip experiment with QSB etc.  But both theory and practice shows low-horizontal will work much better than a vertical inside of a few hundred miles but beyond local ground wave.  At least that's my long experience with them.
I did a brief AAR on my Field Day ops with the mil radios, if you're bored:  https://www.n6cc.com/military-field-day-2024/

No shelf queens!
Cheers, Tim
N6CC

On Mon, Jul 22, 2024 at 6:21 AM Ray Fantini via groups.io <RAFANTINI=salisbury.edu@groups.io> wrote:

As stated before was up in PA Hamburg, or Port Clinton or whatever it’s called with the PRC-74.

Not a lot of experience with that radio and still learning the finer points like how to set the frequency but did have some fun.  At ten local that morning attempted to operate on 7296 for the MMRCG USB net but no love there. Did hear WF2U and a couple other stations but they never did hear me. I was running the whip on the radio so imagine that’s not that efficient of forty. Did hang the dipole antenna for the MRCA M&S net at noon. I remember Joe telling me about doing NVIS with low dipoles so I ran the one leg of the antenna from the radio to a tree maybe six or so feet off the ground with the other leg just running acrost the parking lot. The antenna loaded without issue and did discover that the length of the “cold” side of the dipole makes a difference between getting a good match in transmit but did not hear any difference between if it was attached on receive.

Dean, KK1K as NCS had a big signal, N2MS running portable was also solid on the low dipole and was able to copy most stations without issue. The PRC-74 has a good receiver, did find that it was off frequency and did adjust but think I need to review the procedures for calibration in the field. Did pull that radio apart and do a alignment of all the osculators that set the different frequencies a couple months back but the internal field calibration and clarifier are still a mystery to me.

Before M&S net did hear W2HX and K3TZJ but they never heard me, maybe because I was off frequency or whatever because I was not able to set the frequency until I started talking with N2MS just before the net.

Think the issue is that you set the frequency on the radio and then use the clarifier knob and that’s gets good copy on the receiver but the transmitter is still somewhere else, use to modern radios where you just crank in the channel and go.

Also have to wonder on the feeder cable that came with the radio that allows you to set the antenna up in the field that appears to be some sort of ladder line and maybe if both ends of the antenna were up in the air it would have worked better. Do have to say I like the little hand reels that have the calibration charts on them for laying out the dipole but have to wonder what the significance of the numbers are printed on the chart and line, it’s not frequency or anything like that. One thing about this PRC-74 is when I got it had a huge bag of stuff that came with it, antennas, CW keys, adapters and all sorts of stuff to play with in the field. For fun I did try running the whip antenna on sixty meters and had maybe a half to a third of reception level with the stick. And as far as power goes have been using an 8 AH gel cell, although it’s kind of small for that radio it fits into the battery box well.

As far as frequencies go, will remind everyone that MMRCG has been running a Saturday net on 7296 USB for years now at ten eastern, I have also had issues with 5357 just not making it up north. Can work people like Ron K3TZJ or N2MS but WB2JWU as NCS for M&S has been poor copy at my QTH for almost a year now.

 

Ray F/KA3EKH

 

 

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