[Milsurplus] The BC-1306 Question

[Ray Fantini]

Think the low wattage I am seeing is representative of the fact that I am using a 50 Ohm load as opposed to what the manual tells you to use a 5,000 Ohm load. Will go back and check the AC RF voltage acrost the load and do power calculation that way to see relative power output. The 2E22 is running about 500 Ep and around 400 G2E so would assume its capable of a fair amount of power, speculate its in the range of a GRC-9 that will do fifteen watts in CW and 5 in phone without issue. The BC-1306 and the GRC-9 will operate from the same power supplies using the same cabling. The GRC-9 has a more complex output tank and can match a wider range of impedances but the 1306 appears to be content to running high impedances and do remember that at the time it was developed it was not uncommon to live with both open wire feedlines and short antennas that are high impedance by nature.
As far as a CW Network goes the low power thing is not an issue being CW operators love QRP the bigger issue is that the radio starts at 3800 kHz so that puts you outside the CW segments as far back as I can remember. Use to be the old Novice sub band was 3700 to 3750 and maybe you had CW all the way up to 3800 so maybe you were able to drive the 1306 down to something like 3790 but cannot see it operating below that and as far back as I can remember the band above was always voice.

Ray F/KA3EKH


From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of Hubert Miller
Sent: Wednesday, February 25, 2026 12:31 AM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] The BC-1306 Question


I have not troubleshooted a BC-1306, but the wattage output you saw is seriously wrong.
That is a 2E22 final, right ?
I want to redraw the really confusing output network schematic. It's unnecessarily difficult
to see what's going on. But, this project will have to wait its turn.
Trivia: years ago, like 1990, when i bought a couple 1306s from a fellow in PA, he said they
at one time had a "BC-1306" CW network going. Apparently the thing just covers ( or covered )
part of the 80 meter CW band. Chuck Waite, the name just popped back into my head. I wrote
him a couple years ago for a few more tidbits of info about that net, but no answer.
Over the years i have had a couple TRC-2, the 1900 to 3400 kHz counterpart to the BC-1306,
the latter which was subsumed into the AN/TRC-2 equipment, but i let them go. Along with
the 2 varieties of the PP-39 ( ? is it ? ) of the receiver vibrator supply. You can't keep everything,
i keep telling myself. The antique radio club in Seattle, PSARA, is right now dealing with an estate
that is one real mess. Why leave a big headache for your survivors ? They will NOT thank you.
-Hue Miller
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