[MRCA] Fwd: SCR-274N with B-24 Antenna

mstangelo at comcast.net mstangelo at comcast.net
Mon Jun 2 20:53:11 EDT 2025


Are you simulating the body of the aircraft with some radials?

Mike N2MS

> On 06/02/2025 1:39 PM EDT J Mcvey via MRCA <mrca at mailman.qth.net> wrote:
> 
> 
> It should work with the cap in series with the antenna, plus a good amount of inductance.
> Failing that, try increasing/decreasing the wire length.
> Also, if you are going for the short wire antenna, do not use any coax in the mix-just wire.
> 
> On Monday, June 2, 2025 at 12:53:29 PM EDT, Mark K3MSB <mark.k3msb at gmail.com> wrote:
> 
> 
> Forwarding to this group......
> 
> 
> Hi Guys
> 
> The estimated length for the Command Set antenna on a B-24 is about 45 feet taking into account the length inside the fuselage.
> 
> I cannot get this work with my command set on 3885. No antenna current at all. Dosen't matter if I use the 200 pF cap on the antenna relay unit.
> 
> I can use my 9:1 Balun and series capacitor, the output of which goes to an MFJ tuner connected to the 45 foot wire. I'm getting about 30W out with low Ip.
> 
> Don't understand what I'm doing wrong with only the 45 foot wire.
> 
> I can certainly do it this way at the airwhow this week, but I'd rather not have the MFJ box in line.
> 
> 73 Mark K3MSB
> 
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