On 1/9/07 6:58 AM, in article , "Scott Dorsey"
wrote:

Richard Knoppow wrote:

I am curious what you found lacking in the 51J compared to the
other receivers?

I had the experience of using a new 51J4 along side a new TMC GPR90 in the
late 50's. I loved them both, but I always had better ability to pull out a
readable signal with the GPR90. For specific meet schedules I always
started with the 51J4, because of it's freq accuracy. These were used for
both the ham bands, and for commercial service. We also had the best of
test equipment, so I did run s/n tests on them. I don't recall the numbers,
but the GPR90 was better. Just as I love the SX28 for it's looks and
warmth, I loved the GPR90 for it's. With room lights turned down, it was a
beauty. The 51J4 is cold.

Just FYI, I also had full-time use of a new TMC GPT750 transmitter. There
was nothing not to love about it, either. My little CE 10B could easily
drive it to the max, but I preferred to run it barefoot.

Don


Selectivity. The crystal filter really stinks, compared with the Collins
mechanical filters.

I had a 51J for a few years and traded it up for an R-390. Ergonomically
I liked the sliderule tuning on the 51J more, and the audio quality was
better, but the mechanical filters on the R-390 were a lifesaver.
--scott