开云体育

Mode switching problem or normal operation ?

Robert Holsti All Messages By This Member #393 Edited When I switch from CW mode to USB, The t/r relay momentarily energizes and releases and the relay on the blanking unit energizes and de-energizes. When I switch from AM to CW it seems like the t/r? relay energizes and does not release but I can receive ok. when I switch back to AM, the relay de-energizes. Is this normal operation or what should I look for.? FT301D ?
[email protected] #394 开云体育 Is the VOX gain turned all the way down? toggle quoted message Show quoted text On Jun 1, 2024, at 10:55 AM, Robert Holsti via <kh2br.w6@...> wrote: [Edited Message Follows] When I switch from CW mode to USB, The t/r relay momentarily energizes and releases and the relay on the blanking unit energizes and de-energizes. When I switch from AM to CW it seems like the t/r? relay energizes and does not release but I can receive ok. when I switch back to AM, the relay de-energizes. Is this normal operation or what should I look for.? FT301D ?
Joao Ribeiro All Messages By This Member #395 开云体育 Hi Robert. That is not normal, I would suggest you to look for what is wrong. I have 2 FT301D and none of them are doing what you are describing. Best 73 Jo?o Paulo Ribeiro CT2HZF? toggle quoted message Show quoted text No dia 01/06/2024, às 18:55, Robert Holsti <kh2br.w6@...> escreveu: ? [Edited Message Follows] When I switch from CW mode to USB, The t/r relay momentarily energizes and releases and the relay on the blanking unit energizes and de-energizes. When I switch from AM to CW it seems like the t/r? relay energizes and does not release but I can receive ok. when I switch back to AM, the relay de-energizes. Is this normal operation or what should I look for.? FT301D ?
Robert Holsti All Messages By This Member #396 I soaked the mode switch with Deoxit and that did not fix the problem. I turned the vox gain all the way down and that did not help? BUT !!! ,,,? I discovered what is causing it. When the? CW key is UNplugged from the radio, the malfunction goes away. Now, I have some where to start looking. Thanks for the replies. Robert KH2BR
[email protected] #397 开云体育 Make sure the anti trip is up. toggle quoted message Show quoted text On Jun 1, 2024, at 10:55 AM, Robert Holsti via <kh2br.w6@...> wrote: [Edited Message Follows] When I switch from CW mode to USB, The t/r relay momentarily energizes and releases and the relay on the blanking unit energizes and de-energizes. When I switch from AM to CW it seems like the t/r? relay energizes and does not release but I can receive ok. when I switch back to AM, the relay de-energizes. Is this normal operation or what should I look for.? FT301D ?
Robert Holsti All Messages By This Member #398 Edited Turning the anti trip did not work, swapping out the vox unit board did not help so today I will spend my time tracing wires. Robert KH2BR
Dave Bohlen All Messages By This Member #401 开云体育 I warmed up the computer and asked it. Says a 90c is 600hz. If that works for you I have one. Dave toggle quoted message Show quoted text On Jun 2, 2024, at 7:40 AM, Robert Holsti via <kh2br.w6@...> wrote: [Edited Message Follows] Turning the anti trip did not work, swapping out the vox unit board did not help so today I will spend my time tracing wires. Robert KH2BR -- Dave Bohlen
Robert Holsti All Messages By This Member #402 600 is to wide.. I have a sotabeams DSP filter here that I will try. It may be better then any mechanical filter. They have trace comparisons between a collins filter and sotabeams. Very impressive difference.. take a look. ? ?
[email protected] #403 开云体育 The manual is just better than nothing barely. Hi toggle quoted message Show quoted text On Jun 2, 2024, at 7:40 AM, Robert Holsti via <kh2br.w6@...> wrote: [Edited Message Follows] Turning the anti trip did not work, swapping out the vox unit board did not help so today I will spend my time tracing wires. Robert KH2BR
[email protected] #404 开云体育 That sounds like a fun problem. I need to hear the symptoms again. I ran into something similar once and it was a problem with the VOX stuff I haven’t worked on one of those in years and the memory isn’t what it used to ?be. Hi I could put a mule on the bench and compare voltage reading with you. Dave toggle quoted message Show quoted text On Jun 2, 2024, at 7:40 AM, Robert Holsti via <kh2br.w6@...> wrote: [Edited Message Follows] Turning the anti trip did not work, swapping out the vox unit board did not help so today I will spend my time tracing wires. Robert KH2BR
Robert Holsti All Messages By This Member #405 Ok, Here is the symptom. Even with the symptom and it is not a solid fail. The radio works ok even with the symptom. with no key plugged into the key jack, rotating the mode switch thru all of its positions, no relays click which is good. Plug the key into the key jack, starting from the cw position, rotate the mode switch left to the USB position. Result is that the t/r relay clicks. You can hear it and see it.? I have 2 radios that I swapped the boards out with and the relay still clicks with the cw key plugged into the key jack. That mode switch sure has a lot of wires on it. I am not in a desperate position with the need to swap it out with my parts rig since the radio works. I dont want to give to much information right now but that may come later. (information over load ) Bob KH2BR ?

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