I would add ANAN and Elad FDM-Duo to the current winner list. 73, Barry N1EU _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mail
I haven't seen any test results of the Duo. Has anyone here actually used one? Without a doubt, in red it is the sharpest looking radio currently on the market. Of course it has no ham band BPFs whic
Bob, Sorry but I cannot accept a 1.5 MHz wide filter as a hamband filter. On 40m, we have strong broadcast stations both below and above the ham band. The criticism on the stage gain was a direct quo
Even the best of BPFs are unlikely to have steep enough skirts to prevent overload on 40M and 20M by broadcast stations in EU and AS. 5B4AGN's excellent 6-band TXBPF filter sets for the contesting ba
Filters like those have trouble in achieving 40 dB attenuation in the next/previous ham band. At +/- 750 kHz (or +/- 1.5 MHz) attenuation is practically non-existing. 73, Sinisa YT1NT, VE3EA _______
My old Corsair has a very nice set of BP filters. They were all messed up in my rescue unit. A broad band noise generator and SDR fixed that. I set mine to the CW portion of the bands. shristov wrote
Hi Sinisa, I'm sure you are right, you normally always are. However the Dunestar SPECS on their web site claim 40dB band-to-band rejection. I was just quoting the specs. http://www.dunestar.com/store
Hi Rick, that's what I had in mind. Taking the 7 MHz filter as an example, there is 40 dB attenuation on ~3.5 MHz. But on 6 MHz the attenuation is practically nil. Your preselector is the right tool
Hi Rick, that's what I had in mind. Taking the 7 MHz filter as an example, there is 40 dB attenuation on ~3.5 MHz. But on 6 MHz the attenuation is practically nil. Your preselector is the right tool
Correct, my pre-selector is RX only, which the name implies. That is why every transceiver I have had since the mid 70's was immediately modified with two RCA phono jacks mounted on the back. I inter
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Tue, 13 Sep 2016 08:06:57 -0500
Several preselectors were produced by commercial vendors, some time ago, not likely as good a preselector as yours, but they offered RF sensing to pass the TX signal around the preselector. This seem
But that was yesterday. What do people do today? I'm not a fan of RF sensing. Hot switching? No thanks. You may get away with it in SSB but not in CW. 73 - Rick, DJ0IP (Nr. Frankfurt, Germany) Severa
I agree that RF sense is sort of risky with fast CW. It's not even ideal for SSB but is tolerable. Lots of accessories, even some power amplifiers have used it (for example, most 2 meter amplifiers).
Dr Rick I am only saying that the 7300 has a band pass filter covering the 40m band. It is a bit wider(6500-8000kHz) than the band. If it's too wide for the conditions, a pre-selector is one solution
Gary, The last four hf transceivers that Ten-Tec built did not have that keying loop you described. IMO "most" of the transceivers on the market today do not have that keying loop that you described.
Bob, Indeed, 40m is the main band where needed, unless of course the transceiver is participating as one of the radios in a multi-multi station - in which case you need this for all bands. The proble
QST subscribers can read it here: http://p1k.arrl.org/pubs_archive/90957 Paul, W9AC _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.
Rick, 73, Al _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
Several years ago, I measured a half dozen or so bandpass filter sets that I was able to borrow for NCCC members, and some that I owned. I wrote up a report, that was published in the National Contes