You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
I'm using the RCI-2950DX with a 500W amplifier and love it. For 10m SSB I think it's the most cost effective equipment. And yes, the amplifier costs more than the 2950.
I just bought one of these new units with 16 memory channels and the black display background.
However I don't think the number on the black display are green. I think the display color is Yellow numbers over a BLACK background. The yellow digits have a hint of green, but are mostly Yellow...
New 2950DX display color
I just bought one of these new units with 16 memory channels and the black display background.
However I don't think the number on the black display are green. I think the display color is Yellow numbers over a BLACK background. The yellow digits have a hint of...
SSB Distortion Repaired
I returned radio for warranty repair and got problem resolved.
Technician Note: Rebiased radio for optimum SSB performance and checked all modes/functions...OK
My observation is that the RFX75 amplifier housing was opened and maybe modified/adjusted.
QSO's...
1. mic gain inside the mic is set to factory default.
2. ALC pot and all other pots set to factory default.
3. Problem happens no matter what the radio's MIC-G is set to.
I mis-spoke in my original post when I referred to "TopGun Modulator," I meant to say TG compressor.
Low SWR
This is off-topic to my issue, but here's how I get the low SWR on 10 meters:
1. Start with a new IMAX-2000 antenna and trim length according to instruction to tune it to center freq of 28.4
2. Since my coax run is 85' I decided to use LMR400 coax.
3. Antenna is mounted on...
257HP Distorted TX SSB Audio
My 257HP has bad SSB TX audio brand new out of the box. The SSB TX audio sounds distorted and raspy. It sounds alot like RF getting into the modulation. However, I don't think it's an RF problem. Even reducing the RF output to only a few watts still produces the...
"CON 1" Terminals not cut off
I bought my 257HP from GI Joe in Dec 2011 and the CON1 terminals were not tampered with. The CON1 terminals were jumpered and the other CON terminals were left unharmed, ready to be set to CB mode.
So looks like some dealers are playing games!
general observations and improvements
Observations
1. Can only tune across the band in 10kHz steps. 1kHz step works only within a 10kHz range.
2. The ERF-7530 power transistor is very senstive to frequency. At 28MHz max SSB output is 65W PEP; at 29 MHz even less; at 27 MHs 75W+
3...
With SSB: 65W PEP on an Astron RS-20M I get peak amp draw of 15 and see no voltage drop. Typical draw is 10-12 amps.
I use a heatsink fan to protect from overheating.
a
I noticed the same result, adjusting RV16 for AM power also affects FM output.
After my adjustments I get the following output at 28.45MHz:
AM: 24W
FM: 24W
SSB: 65W PEP
You get more output at lower frequencies.
I added a dual-speed fan on the heat sink that also blows directly...
Adjusting RV power levels
When adjusting RV 9,14,16 (SSB, FM,AM power levels) what turn direction (clockwise or counter clockwise) increases power level?
When adjusting the audio level pot in the microphone, what turn direction increases audio level?
Thanks!,
Jack
Any updates on newest model
It's been awhile since any talk about latest improvements on 257HP. Any idea when updated models will have enhanced heatsink/fan for the RFX75?
How about multiple CTCSS tones, instead of just one (88.5)?
This forum does not allow a single user to have more than one username. If anyone wants to change their username contact an admin and it will be done. Multiple accounts belonging to the same member will be deleted without warning.