开云体育

CW Filter Not Working R4C

Lorne VE6CSR All Messages By This Member #83958 开云体育 Hi Everyone.? I bought a new old stock International Radio Corp 500 Hz CW.? Drake R4C is in the 19200 serial number area.? Took off the middle back bracket and carefully lined up the four pins and while under slight pressure of that rear vertical copper angled spring I reinstalled the bracket with the two screws.? Found CW on 40 meters on SSB but when switched to CW 0.5 mode it’s like the filter was not even there.? Is there something I missed doing in the installation. I see in the manual they talk about in AM for some kind of jumper resistor to be removed by taking the top cover off. Is that necessary in order for the filter to work. Where do I find it. Or is my filter a bad one??
Lorne VE6CSR All Messages By This Member #83960 开云体育 Problem solved on advice from a friend Drake expert. Turned the filter 180 degrees so writing was upside down. Plugged back in. Fully functional.? toggle quoted message Show quoted text From: [email protected] <[email protected]> on behalf of Lorne VE6CSR via groups.io <lorneinthesand@...> Sent: Sunday, March 30, 2025 5:05:30 PM To: [email protected] <[email protected]> Subject: [DRAKE-RADIO] CW Filter Not Working R4C ? Hi Everyone.? I bought a new old stock International Radio Corp 500 Hz CW.? Drake R4C is in the 19200 serial number area.? Took off the middle back bracket and carefully lined up the four pins and while under slight pressure of that rear vertical copper angled spring I reinstalled the bracket with the two screws.? Found CW on 40 meters on SSB but when switched to CW 0.5 mode it’s like the filter was not even there.? Is there something I missed doing in the installation. I see in the manual they talk about in AM for some kind of jumper resistor to be removed by taking the top cover off. Is that necessary in order for the filter to work. Where do I find it. Or is my filter a bad one??
Steve Wedge, W1ES/4 All Messages By This Member #83968 Try moving the filter to one of the other slots. If it’s good,it’ll work. ?If it doesn’t work in any of the other slots, it is likely bad. Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a banana. toggle quoted message Show quoted text On Sun, Mar 30, 2025 at 8:05 PM, Lorne VE6CSR via groups.io <lorneinthesand@...> wrote: Hi Everyone.? I bought a new old stock International Radio Corp 500 Hz CW.? Drake R4C is in the 19200 serial number area.? Took off the middle back bracket and carefully lined up the four pins and while under slight pressure of that rear vertical copper angled spring I reinstalled the bracket with the two screws.? Found CW on 40 meters on SSB but when switched to CW 0.5 mode it’s like the filter was not even there.? Is there something I missed doing in the installation. I see in the manual they talk about in AM for some kind of jumper resistor to be removed by taking the top cover off. Is that necessary in order for the filter to work. Where do I find it. Or is my filter a bad one??
Steve Wedge, W1ES/4 All Messages By This Member #83969 Sounds like bad connection(s) between the filter and the radio. ?The filter is electrically symmetrical. You fixed it, so I wouldn’t bother messing with it. 73, Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a banana. toggle quoted message Show quoted text On Sun, Mar 30, 2025 at 11:18 PM, Lorne VE6CSR via groups.io <lorneinthesand@...> wrote: Problem solved on advice from a friend Drake expert. Turned the filter 180 degrees so writing was upside down. Plugged back in. Fully functional.? From: [email protected] <[email protected]> on behalf of Lorne VE6CSR via groups.io <lorneinthesand@...> Sent: Sunday, March 30, 2025 5:05:30 PM To: [email protected] <[email protected]> Subject: [DRAKE-RADIO] CW Filter Not Working R4C ? Hi Everyone.? I bought a new old stock International Radio Corp 500 Hz CW.? Drake R4C is in the 19200 serial number area.? Took off the middle back bracket and carefully lined up the four pins and while under slight pressure of that rear vertical copper angled spring I reinstalled the bracket with the two screws.? Found CW on 40 meters on SSB but when switched to CW 0.5 mode it’s like the filter was not even there.? Is there something I missed doing in the installation. I see in the manual they talk about in AM for some kind of jumper resistor to be removed by taking the top cover off. Is that necessary in order for the filter to work. Where do I find it. Or is my filter a bad one??

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