I know one of the seven
Posts by DB8TF
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PA3FYM: sorry but you are on my 100% ignore list, i don't read your posts since many weeks
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It would be nice if this VHF>13cm transponder could be activated with a DTMF code on 2m VHF FM and then stays activated for a few minutes.
A always running transponder only causes QRM and confusion.
And some kind of identification is surely needed.
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Still unnecessary QRM around 740
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Is this QRM from that transponder?
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My new BU500 is well within the regulations used with 70cm IF.
Measured already some time ago shortly after the Hamradio.
I just wondered where DK1ML got the info about the automatic LO switching.
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BLF7G22L-130
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DK1ML: from where do you have this information?
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The "old" BU500s are known for a high LO signal on the output.
Maybe that ist enough to drive your WiFi PA to the 1W.
If you can, try to build a narrow interdigital filter and connect that after the BU500.
Vy73
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Has anyone already tested this coupler with 100W CW?
The Anaren couplers i use are double the size and only rated at the half CW power.
Because of that i am a little bit unsure if they are really capable of handling 100W.
Vy73
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Just for fun measured the output isolator from my PA : 0,4dB loss on 2,4GHz.
Reverse ca 16dB@2,4GHz and ca 33dB@2,14GHz
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i think in ibiza is no 2,4ghz transmission allowed for non EA hams?
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To solve the (similar) BU500 power up problem with slowly rising voltage i use a small relais which is connected to VCC via a series resistor and a parallel capacitor.
So this relais switches the VCC to the BU500 after about 1 sec (when the C is charged)
and the VCC is stable.
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Set the SUT fuses to 10 for slowly rising power.
Page 25 >
http://ww1.microchip.com/downloads/en/DeviceDoc/doc8126.pdf
VY73 DB8TF
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Maybe some screenshots explain it better:
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DL1EMA starts with dB(m) so he wanted a value that could be "measured" and not be guessed.
73s
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Take the NBTP floor as S0 (ca -127dB) and then the CW beacon has abt S5+3dB.
Strong stations have a signal about S6.
Everything above is unwanted and to much uplink power.
The strongest HAM station i saw till now had S7+3dB. (SSB)
BTW, Forget the S-Meters on the WEB-SDRs they are all wrong.
VY73 DB8TF