Search results

Oh! Thanks for the pointer! Dual TFT display and dual receiver, HF+6M. Just enough information to make me want to know more. :) But no pictures yet, damn. :( -Bill

This past Thursday, there was a tremendous storm here in the SF bay area, complete with thunder and lightning. Around 11PM, after the ruckus had died down a bit, I turned the radio on and heard ZS4L in South Africa on 14.285. I managed to work him as his last contact before he went off the air...

I have the older Kenwood SO-2 TXCO option for my TS-850SAT and TS-950SDX. At least with the TS-850SAT, there was a noticeable improvement in frequency stability when I installed it. (The TS-950SDX comes with it built in and I've never tried disabling it, so I don't know how much difference it...

I think the manufacturer specs emphasize the maximum output level at which you can maintain linear operation. The are a bunch of amateur radio transceivers that use a pair of 2SC2879s as finals (Kenwood TS-440, 450, 850, etc...), but those radios are all limited by design to 100 watts PEP. The...

The voicelock (sometimes called 'clarifier') is needed for SSB. When operating in single sideband mode, it's important that you and the person you're talking to be transmitting/receiving dead on (or very close to dead on) the same frequency. When you get a chance, turn the radio on and see if...

What little I've heard implied that it would be the successor to the TS-950SDX. I was hoping that would mean it would be capable of the same great hifi audio. Guess we'll just have to wait and see. (The TS-950SDX was also very expensive when it was new, something like $4000. And that was back in...

Rumor has it that Kenwood will be unveiling the TS-990 this year (I'm assuming at Dayton). Has anybody heard any new info about it? I doubt I'll ever get to own one (I have too many Kenwoods already :) ), but I'm still really curious about it. -Bill

Just a heads up, I posted an article in the "amateur radio modifications" section on how to modify the Kenwood TS-850S for HiFi AM audio. I used a signal generator program on my computer to test the response, and it's nearly flat from 20Hz to 10000Hz. And that's without the DSP-100 unit. (Note...

So, last week I experimented with modifying the audio input circuits on my TS-850 to improve the frequency response. The results were pretty good, so I'm posting what I did here. Note: the end result is similar to what can be accomplished with the mods shown here: Kenwood TS-850S AM...

I'm not exactly sure what the FMRS frequencies are. I'm assuming they're in the UHF range. If so, then what might work for you is the Kenwood TH-F6A handie talkie. It's a tri-bander for 144, 220 and 440Mhz, with a receiver than works from .1 to 1200Mhz (with a chunk of the 800Mhz band blocked...

With the TS-950SDX, you can't turn off the DSP unit for AM and SSB transmit. That's one of the major differences between the TS-950S/TS-950SD and the TS-950SDX. With the 950S/SD, you had the DSP-10 unit, which was technically optional, just as the DSP-100 was optional for the TS-850 and TS-450...

The TS-950SDX's max TX frequency response is about 6.7Khz. With the DSP unit all the way open. The TS-850/DSP-100 can do about 6Khz. -Bill

Yeah, in spite of the fact that some radios can be as expensive a car, I've never heard of a dealer that will let you pay for one on an installment plan like a car. :( Can't blame you for asking though. The FT-9000 rigs are really shiny. -Bill

The TS-450 has the same receiver filter selection controls as the TS-850 and TS-950. However I don't know what capabilities it has for transmit. If you look at a picture of one, to the left of the VFO know, near the top, there should be two buttons marked 8.83 and 455, respectively. These let...

I did a little googling to jog my memory. His name is Brad, "Radio America 123 in the Gulf Of Mexico." Unfortunately I wasn't able to get through to him on 38LSB when I heard him the first time. I live in an apartment building and have just a simple vertical antenna for 11 meters, and I can't...

I posted it further back in this thread (I think it's on the previous page). Here it is again: http://people.freebsd.org/~wpaul/station/amtests.mp3 -Bill

Well, this is supposed to be a thread about 11 meter rigs, but unfortunately the only radios I know that have those kinds of capabilities are all made for ham use. Most ham rigs have adjustable RX filters since you may need different settings depending on the operating conditions. The HF ham...

Well, again, the 12Khz here is for the RF signal filtering, and with AM, you have two sidebands (basically the same audio is transmitted twice). So the resulting audio response is actually half that. If you have a 6Khz filter with AM, you'll hear about 3Khz of audio (maybe a little more since...

I had some time to putz around a bit this weekend, so I made a sample recording of my rig, illustrating what it sounds like when you try to cram HiFi audio through a 6Khz crystal filter. http://people.freebsd.org/~wpaul/station/amtests.mp3 This recording is in AM mode (not ESSB). The...

It looks like this mod mainly improves the response of the AF circuits. I actually found a recording on youtube that seems to show the difference: CB RADIO COBRA 148 GTL AFTER AND BEFORE THE SRC WIDE RECEIVE MOD - YouTube I think you're still limited a bit by the crystal filters though...