Moderator WA2WMR Posted July 1, 2022 Moderator Share Posted July 1, 2022 The mic for my IC-730 broke and exact replacements are not available. I have an old Astatic D-104. What would it take to make that work with the 730? 1 Link to comment Share on other sites More sharing options...
Administrator K3MRI Posted July 10, 2022 Administrator Share Posted July 10, 2022 Lind, found this about the connection to a 706: maybe relevant: https://www.worldwidedx.com/threads/wiring-d-104-hand-mike-to-icom-radio.16317/ And another: http://www.copperelectronics.com/discus4/messages/29/77689.html?1108406270 Link to comment Share on other sites More sharing options...
Moderator WA2WMR Posted July 19, 2022 Content Author Moderator Share Posted July 19, 2022 Thank you. I'll check it out. Link to comment Share on other sites More sharing options...
Moderator WA2WMR Posted August 23, 2022 Content Author Moderator Share Posted August 23, 2022 They mentioned in one of the links that it doesn't sound as good as the Icom mic. Could that be due to the 104 being made during the days of tube radios and being of a difference in impedance than the Icom mic (which presumably would match the impedance of the radio)? Link to comment Share on other sites More sharing options...
Administrator K3MRI Posted August 23, 2022 Administrator Share Posted August 23, 2022 1 hour ago, WA2WMR said: They mentioned in one of the links that it doesn't sound as good as the Icom mic. Could that be due to the 104 being made during the days of tube radios and being of a difference in impedance than the Icom mic (which presumably would match the impedance of the radio)? Good catch. Sounds very plausible. Link to comment Share on other sites More sharing options...
Moderator WA2WMR Posted August 24, 2022 Content Author Moderator Share Posted August 24, 2022 I just checked the specs. Icom 730 1300 ohms D104 5000 ohms or less 1 Link to comment Share on other sites More sharing options...
Administrator K3MRI Posted August 24, 2022 Administrator Share Posted August 24, 2022 22 minutes ago, WA2WMR said: I just checked the specs. Icom 730 1300 ohms D104 5000 ohms or less You were right!!! Link to comment Share on other sites More sharing options...
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