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Mostly unwanted information about the Kenwood TH-79a amateur radio.
This I found this info in a text file I wrote on my 286 years ago, and thought I'd post
it here in case someone still uses one of these. If you find this useful for some
reason I'd love to hear how it it was used. I've haven't really been involved in the
ham radio community for quite a while now, but I'd like to get back into it again
sometime.
Misc info about the TH-79A:
Here is some information about the TH-79A.
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BAND LIMITS
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VHF UHF
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|RX = 87.240 ~ 135.995 AM | RX = 135.425 ~ 220.000 FM |
| 136.000 ~ 185.500 FM | 400.000 ~ 517.000 FM |
| 300.000 ~ 399.995 FM or AM | 800.000 ~ 1105.000 FM (No Antenna)|
| 400.000 ~ 489.250 FM | |
| | |
|TX = 136.000 - 179.995 FM | TX = 400.000 - 511.995 FM |
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CURRENT DRAIN
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The current drain for this radio is:
Rx no signal, dual band: 80 mA
Rx no signal, single band: 45 mA
Rx battery saver on, dual band: 20 mA
Tx HI power: VHF 1.3 A UHF 1.8 A
Tx LO power: VHF 0.6 A UHF 0.6 A
Tx EL power: VHF 0.3 A UHF 0.3 A
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ADDITIONAL INFO
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This unit scans at about 5 channels per second.
The Tx power at either end of the 440 band is about 0.5 Watts.
The power connecters on this radio are: 5.0 mm O.D.
2.1 mm I.D.
The sensitivity in these bands starts getting good around...
In band "A" the 440 side, at 403.000 MHz.
In band "B" the 440 side, at 418.050 MHz.
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The new range limits for my TH-79A are as follows...
(This is where the PLL will lock up)
VHF UHF
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RX = 87.240 ~ 135.995 AM RX = 135.425 ~ 220.000 FM
136.000 ~ 185.500 FM 400.000 ~ 517.000 FM
300.000 ~ 399.995 AM 800.000 ~ 1105.000 FM (No Antenna)
300.000 ~ 488.000 FM
TX = 136.000 - 179.995 FM TX = 400.000 - 511.995 FM
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The coding used to program a TH-79A manually using DTMF tones in clone mode:
(note to geeks, I decoded this manually with nothing but a tape recorder and a dtmf generator!)
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