Pairing the AH-705 Tuner with the IC-705 QRP Radio. Live at POTA K-0925.
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- Опубликовано: 16 авг 2023
- Hey All,
I finally got the AH-705 to pair with my IC-705 and decided to take it out and see how it works. I used my PackTenna Mini 9:1 Unun Random Wire and the KM4ACK EFHW to test out the tuner and got an SWR of 1:1 on just about every band I tried. For sure I hit 40m, 20m, 17m, 15m, and 10m. The band conditions were pretty bad and there was alot of fading with stations. Lets check it out and please watch @Ham-Solo
thanks Sr great video terrific 73 from kb2uew
Good to hear someone say Roger instead of QSL. I really wish hams would consult a few manual on procedures.
hahaha Mike.. Get that finger in the air ! ! !... the QRP struggle is real.. It's one of the constants of the universe, LOL.. thx for the video.. k0klb
So here is a question, that Icom tuner supports tuning a random length wire itself (there is a adapter included with the AH-705 to attach a wire right to the coax plug) so it would be interesting to compare the performance of the Packtenna 9:1 compared to the AH-705 with a wire attached that is exactly the same length as the one attached to the Packtenna. Assuming the AH-705 can tune that wire (which from what I hear it should) if you end up with equivalent or better performance, it would make for a simpler setup. I have an AH-705 myself and a Packtenna EFHW, but not the 9:1 like yours. I plan on trying the tuner with a 71ft wire to see what kind of performance I might get compared to the EFHW without the tuner, and with it.
The only initial thought I have there is that the PackTenna random wire is 29 feet long and has a 9:1 unun to bring down the impedance to near the 50 ohms the radio needs. A random wire without the unun may be too great a mismatch for the tuner to compensate. A resonant wire of a half wavelength would work easier but I don’t feel like a non-resonant random wire would be close enough to be matched with the tuner. Ham-Solo K0FYR
The AH-705 is specifically designed to work with random wires directly attached to the tuner (only needs 9:1, which the tuner can handle), though not with an EFHW which would need an unun (the tuner can't compensate for the 49:1).