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#1
April 7th 06, 10:40 PM
posted to rec.radio.amateur.homebrew
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IC756/TL922 keying - Any Suggestion?
Hi, i'm searching a simply amp keying circuit, just to control a Kenwood
TL922 with an ICOM IC 756 Pro III. What do you suggest to me? 73 de Alex ik8xir |
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#2
April 11th 06, 03:24 PM
posted to rec.radio.amateur.homebrew
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IC756/TL922 keying - Any Suggestion?
"Alex" schreef in bericht ... Hi, i'm searching a simply amp keying circuit, just to control a Kenwood TL922 with an ICOM IC 756 Pro III. What do you suggest to me? 73 de Alex ik8xir Use an extern relais , otherwise you burn the very little tx relais (my friend dit it with the tl922 ) because the key voltage is 120v suc6 |
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#3
April 11th 06, 09:20 PM
posted to rec.radio.amateur.homebrew
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IC756/TL922 keying - Any Suggestion?
Hi, i'm searching a simply amp keying circuit, just to control a Kenwood
TL922 with an ICOM IC 756 Pro III. What do you suggest to me? Use an extern relais , otherwise you burn the very little tx relais (my friend dit it with the tl922 ) because the key voltage is 120v ================================= Would a high voltage switching transistor with/without an opto-coupler circuit not be more reliable ? The opto-coupler circuit can be tailored for the transceiver's output and a cheap High Voltage transistor could excite the amplifier. Just a thought. Frank GM0CSZ / KN6WH |
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#4
April 16th 06, 07:43 PM
posted to rec.radio.amateur.homebrew
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IC756/TL922 keying - Any Suggestion?
"Highland Ham" wrote: Would a high voltage switching transistor with/without an opto-coupler circuit not be more reliable ? The opto-coupler circuit can be tailored for the transceiver's output and a cheap High Voltage transistor could excite the amplifier. Just a thought. Frank GM0CSZ / KN6WH ---------------------------------------------------------------------------- --- Many thanks Frank i'm searching for this kind of circuit, have you a printable (.jpg, .bmp, .gif, .tif etc.)) version with the complete parts list? best 73 de Alex IK8XIR / N6XIR |
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#5
April 16th 06, 07:53 PM
posted to rec.radio.amateur.homebrew
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IC756/TL922 keying - Any Suggestion?
"on4ahf" wrote Use an extern relais , otherwise you burn the very little tx relais (my friend dit it with the tl922 ) because the key voltage is 120v suc6 Thank you for your help, I know that (about the very little reed relay inside the rtx), for this reason i'm searching for a electronic circuit, with an switching absorption "greater" less than 500mA @ 16Vdc (as declared by Icom). A transistor feat. circuit i believe will be fine. 73 de Alex IK8XIR / N6XIR |
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