Recent content by Radioman56

Virtually all the MOSFETs mentioned above, have a totally different Vgs (gate threshold voltage range) of 2 to 4 volts, whereas the Vgs of the "RM-3" MOSFETs is MUCH lower, of which the fixed-bias circuity of the RM Italy amplifiers were designed for. Especially if you want the amplifier to...

Concerning the FCC certification of the BLA-703 linear amplifier. After what seems to be like an eternity (since early 2024.!) of dealing with FCC administration issues, the RM of Italy company just received today (1-16-25) the actual "hard-copy" of the FCC certificate for the BLA-703...

I'm very glad to hear that.! :) As I had mentioned before, the 2nd production-run which was finished in October of 2024 had the new Firmware. Just as an FYI., the way to read the 6 digit serial-number of an RM unit is as follows: Example given ( 400224 ) The last 2 digits represents the year...

The "copy & pasted" info (below) is the majority what's on the FB link which was placed several times earlier in this "Thread", and is being repeated here for those who don't have a FB account for the ability to view it... Title: Conversion of the BLA-703 to operate for both the 10 and...

Howdy Gile, unfortunately, the short answer is no :-( This is because the "1st-run" of them (ie: low serial-numbers) were only sold in Europe (no direct sales in America until Nov. 1, 2024) and of course being European sold, were "Export" units (ie: 11-meter band "open"). BUT., some of those...

Hi "Miura", Just make sure that once you receive it, to check that is contains the new "user-changeable" Firmware update, that gives you the ability to change between the factory / stock single "power-up beep", to the Morse-code letters A and M, as explained in my "conversion" article. If ya...

The main importer of "all things RM"., is selling them for 800 plus shipping (he only charges what it actually costs him), and although they're coming out of the "lefty" state of California., there is NO sales-tax being charged to out-of-state buyers.! :) Here's a web-link to the FB article...

When you read the article above (if you've got access to that Facebook web-link) you'll read that the "R60-jumper" ONLY needs to be removed if / when you wish to use the amplifier for 11-meters. When it's new / "out-of-the-box"., it will operate on the entire 10-meter band (only remove the R60...

The BLA-703 "straight out of the box" is designed to operate within the entire 10-meter band, and only needs the 11-meter band modification (ie: R60 removed) for those who wish to operate it in the 11-meter band and / or the upper and lower 11-meter "free-bands". If you are getting the "4-beep"...

The original "batch" which was released back around February of this year, and was only sold to European and other countries AND continents where (of course) FCC approval is NOT required. The latest "batch" which just arrived in America on November 1st, is in fact, FCC approved., and required...

Please just take take the time to read the VERY detailed and well-explained, user / owner manual., which is attached below as a PDF file... Regards / 73 Eric Klein Klein Communications

Yep., there sure is (though it's internal)., along with a "selectable-firmware" change (done externally) for those Folks who may have a "driving" radio that is not as "RF-clean" as it should be, so as to help in minimizing the "tripping" of the #4 safety shut-down parameter (ie: out-of-band /...

Even though the BLA-703 is in fact an "FCC-Approved" linear-amplifier (ie: went through 10s of thousands of $$$$ and many months of time for FCC approval)., it is NOT "full-HF" in its capabilities (ie: 1.8 Mhz / 160M to 54 Mhz / 6M) as their other Ham / Amateur units are. One MUST remember...

I have the full set of schematics (7 pages) and the PCB layouts (2 pages), and should be available upon request., though I will need to first make a phone-call to OK it with the lead engineer and the owner of RM... Regards / 73 Eric Klein Klein Communications https://www.facebook.com/radioman55...

The BLA-703 base-amplifier is NOW available.! :) (as of Nov 1st 2024)