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write your own review of the Kenwood TR 751A.
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OE5BFM
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Rating: 5/5
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Jan 5, 2012 01:38
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Simply Great!
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Time owned: more than 12 months
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During 30 years of Ham Radio I used a lot of VHF / UHF Transceivers. Most of them worked fine, but often had some unpleasing faults, e.g. getting too hot, not very reliable especially in the car, not very sensitive and so on.
I bought this rig used because I read quite often that this TRX should be one of the best 2m Allmodes. Usually I use it in FM Mode, but during contests and fielddays also in SSB, with fine DX-success.
So I can say, if best receiving performance is important this is really the best rig I have owned so far, surprisingly even a bit better than the compared IC-275 which I had before!
If you want a broadband receiver with quick scanner and 1000 memories, this isn´t the right TRX for you.
The TR 751 is simply to operate, it get´s only hand warm at 25 watts and no noisy fan, some important settings (Modulation, S-Meter, Power Output for driving an amp) are easy to adjust which is well described in the servicemanual.
The modulation is fine still with the stocked mike, the S-Meter shows a bit too much in FM, but this happens other rigs too and is adjustable inside.
So I agree that this rig is one of the best 2m Allmodes ever made.
73!
Herb
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K7LA
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Rating: 5/5
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Dec 21, 2010 12:22
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Great Used Rig
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Time owned: more than 12 months
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In summary, a terrific receiver and clear transmit audio. Match it up with a small amplifier and good directional antennas and you've got a winner. Got mine at a ham club raffle drawing, and I grin everytime I use it.
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VE6CPP
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Rating: 5/5
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Dec 21, 2010 07:25
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Great Rigs !!
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Time owned: more than 12 months
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Great Lil Rig although lacking a few of the 'Bells and Whistles' of the larger ones. I picked one up on E-Bay a couple years ago, intended for /P use..but it now does SSB/MS and EME in the shack using a 300W Mirage. The only rigs I have seen that can beat the .12uv Rx are .11uv for 10x the cost of these ! I started a User Group if anyone is interested.. http://ca.groups.yahoo.com/group/TR-751_851/
73
Jerry VE6CPP
DN39or
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WA4JWU
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Rating: 5/5
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Dec 12, 2010 20:26
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great
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Time owned: more than 12 months
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I have owned one of these for more than 15 years now. I purchased another one about 2 years ago and just today bought another one that has a bad pot on the vol switch. I will check my source to see if any are still in stock. They are close replacements but work great for me, total audio is a little lower but has not been an issue, and they are turn on rather than push models.
The only issue I have is the bad pots, you can take them apart and rebuild them or there is sometimes replacements that can be found on the net.
Best receiver ever made for 2 M SSB. 25 watts out is a little light but a cheap brick will get you up and running in short order.
Best of all, there is no menu's, just knobs a buttons. You got a like that.
To bad the 3 bigs don't still make all modes like this. I would be 1st in line to get a new model.
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G1HQK
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Rating: 5/5
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Oct 16, 2010 09:44
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Brilliant
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Time owned: more than 12 months
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Had mine from new and it was fab, my only regret was that I sold it several years ago for a shack in a box, wonder why the big names have not continued with this type of radio, there is a market for them worldwide.
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GM6TVR
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Rating: 1/5
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Jun 12, 2010 02:18
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Disaster
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Time owned: more than 12 months
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Traded in my super 9130 for the 751E, used it for two weeks, went to work in Dubai, switched it on 13 months after purchase only to find the microprocessor had gone down. Cost me an arm and a leg to have it repaired, plus the usual UK courier charges. Fired it up on my next return home and found that it transmitted elsewhere in the spectrum. Traded this one in for six tins of dog meat. Never replaced Kenwood with Kenwood ever again. Good luck with yours, John
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ZL3JT
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Rating: 4/5
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Feb 9, 2010 15:15
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Squelch control
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Time owned: more than 12 months
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Kenwood TR751 and TR851 Volume/Squelch control repair.
Part number: R23-9402-05
This part is now discontinued but might be repairable. Test each pot resistance to ensure the carbon track is OK. Squelch 50k Volume 20K (some may vary)
1. Dismantle the radio to expose the unit and remove it from the circuit board.
2. Carefully file off the ends of the two rivets flush with the rear plate.
3. Prise the rear plate off, and remove the switch unit.
4. Pull out the rivets, then remove the ‘C’ clip from the central shaft.
5. Remove the central (volume shaft).
6. Dismantle each potentiometer in turn, taking care not to mix the parts.
7. Clean the wipers with contact cleaner on the cotton bud.
8. The centre contact ring of each potentiometer will be dirty and oxidized, clean and polish the contact rings with silver polishing fluid soaked cotton bud. Then clean off the excess, and buff with a clean bud.
9. Temporarily assemble each pot, hold together and test resistance between the centre wiper and the outside terminals as the control is rotated.
10. Reassemble each unit with a touch of lubricant. (WD40 or CRC56)
11. Manufacture new rivets from copper wire, reassemble the units in reverse order of dismantling, and fit new rivets, (see below).
12. Carefully refit the rear plate, and re-rivet by tapping carefully with a small jeweller’s hammer.
13. Test resistances again for full rotation, then assemble the circuit board and re-assemble the radio.
This is a very delicate operation as the units are tiny. Great care must be taken when riveting, and ensure the head of each rivet is directly on an ‘anvil’ otherwise the plastic components will break.
Manufacture of rivets.
The rivet diameter is 0.038 inches, approximately 1.0mm. I used copper wire 1.0mm.
I made a jig in my lathe out of ½ inch brass hex, about 10mm long, drilled a 1.0mm hole in the centre, then cut with a fine jeweller’s saw from one side into the centre hole. This jig enable me to grip the copper wire in the lathe chuck. With about 0.5mm of wire protruding out of the jig, I carefully formed the rivet head by tapping with a jeweller’s hammer as the lathe slowly turned.
Then I reversed the formed rivet in the jig, and at a distance of 25.0mm, and leaving 1.5mm exposed, I used a fine file to reduce the diameter of the rivet to fit the holes in the rear plate. Check the correct length by careful measurement.
Assemble was a little tight as the copper wire is about 0.002 inches too large, but it was not difficult and made the whole unit feel ‘tight’.
Fit the rear plate, and test the potentiometers again, check the operation of the switch etc, before carefully forming the rivet ends over to finish. Make sure the units are held with the rivet heads on the ‘anvil’ as the other ends are formed with a jeweller’s hammer. Take your time, many taps with a 1 ounce hammer, rather than a few with a bigger one. The ‘shoulder’ on the rivet should match the rear plate to take the stress away from the switch and pots while riveting.
If you don't want to tackle this job yourself, find someone who will and use this for a guide!
Q & A via QRZ.com/zl3jt
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G7TOK
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Rating: 5/5
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Oct 12, 2009 14:33
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Unrivalled
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Time owned: more than 12 months
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The best performing 2m multimode bar none.
I have personally compared this transceiver to an FT-221R with Mutek, an FT-225RD with Mutek, and a stock Icom IC-275H and Yaesu FT-736R.
It is consistently able to resolve weak signals, show immunity to strong in-band and out-of band interference and demonstrate a receive unencumbered by synthesizer products or poor receiver design.
Barring the known issue with the dual-concentric vol/sq controls, it is solidly built, has no noisy cooling fans and has a clean output signal perfect for driving amplifiers.
As an indication of its ability, it even performs better than the radio made to replace it, the TM-255E.
It's a sad indictment of Kenwoods attitude that no more spares are being made for the vol/sq control, how many of these wonderful radios must now be resigned to the scrap pile or languishing unused because of this ?
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WA4JWU
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Rating: 5/5
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Jun 22, 2009 19:24
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help
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Time owned: more than 12 months
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This has been a great rig. As long as I can keep it going it will remain on the air. However I need help in locating an on/off/volume/squelch switch board.
rverble@cfl.rr.com
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W3RXO
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Rating: 5/5
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Aug 11, 2008 12:06
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Best all mode 2M ever, IMHO!
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Time owned: more than 12 months
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I am on my second one, and my only regret is having sold the first one, that I bought brand new, around 1989, or so. Super hot receive, great transmit audio, easy to use and a real workhorse, of a radio. It really shines as a base, with an MC-60 and a good beam. It's stock 25 watts, gets me into QSO's of greater than 200 miles, EASILY. I may not have any signal showing on the other end, but I am heard, quite well. When I drive my TE Systems 1452G with it, it REALLY SHINES. I do not need the receive preamp on the TE (which is a dandy of a preamp), as I never have any trouble pulling out the weakest of signals. This is one fine older radio, that IF you can find one for under $250, consider yourself LUCKY, and grab it up, without hesitation. They are getting scarce as hen's teeth, and the price keeps climbing.
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