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Collins mechanical filters installation guide for Yaesu FT-8xx radios - update 15May24

Petr Ourednik All Messages By This Member #114806 Hi folks, I updated the document about the Collins mechanical filters for FT-8xx radios.? More Collins p/n and used aliases on the market added to the document including the real pictures as a proof. Hope it helps to someone, 73 - Petr, OK1RP
Ham Radio Member Profile All Messages By This Member #114807 Thank you for the updated docs. ?The problem now is that people are asking (and getting) very high prices for these Collins ?filters. ?The used ICOM filters are still very reasonably priced.
Jeff WN1MB All Messages By This Member #114808 开云体育 Get 'em while you can. The prices will continue to rise as the supply dwindles. And as any real CW op knows, in crowded band conditions a stock 817/818 is torture to operate. On 5/16/24 12:10, Ham Radio wrote: toggle quoted message Show quoted text Thank you for the updated docs. ?The problem now is that people are asking (and getting) very high prices for these Collins ?filters. ?The used ICOM filters are still very reasonably priced.
Joseph Wonoski All Messages By This Member #114809 Are Collins filters specific to each brand,/model of radio?? Joe N1KHB? toggle quoted message Show quoted text On Thu, May 16, 2024 at 1:17 PM, Jeff WN1MB <jwbauer@...> wrote: Get 'em while you can. The prices will continue to rise as the supply dwindles. And as any real CW op knows, in crowded band conditions a stock 817/818 is torture to operate. On 5/16/24 12:10, Ham Radio wrote: Thank you for the updated docs. ?The problem now is that people are asking (and getting) very high prices for these Collins ?filters. ?The used ICOM filters are still very reasonably priced.
Bryan Nehl All Messages By This Member #114811 Joe, They can vary between brand/model.? As in this subject line note the Yaesu FT-8XX. They are the same for 817, 818, 857, 897.? I think maybe 847 as well.? Definitely not 891 (no filter). A very key specification is the center frequency of the filter. In this case: 455.00kHz center frequency. 72 de Bryan, k0emt toggle quoted message Show quoted text On 2024-05-16 15:39, Joseph Wonoski via groups.io wrote: Are Collins filters specific to each brand,/model of radio? Joe N1KHB
Petr Ourednik All Messages By This Member #114818 Edited Joe, as Bryan said. They are specific by center frequency, in/out impedances, pinout and daughter board layout and finally size of the package. Anyway, some radios share the same filters... even across different manufacturers. Yaesu FT8xx uses as same filters as Yaesu FT-1000/1000MP, AOR 5000 or AOR 7030 or even TenTec Omni VII... Each manufacturer and seller often re-labeled Collins filter with own code and Aliases but they are still same Collins... These EMF filters are not as good as crystal filters, but they are still good performers in our radios. (even they are getting old and parameters are changing) 73 - Petr, OK1RP
Joseph Wonoski All Messages By This Member #114825 Thanks all for your response to my filter question. I should learn more about them. Maybe some enterprising soul will clone the Collins's units for the ham community. Joe N1KHB? toggle quoted message Show quoted text On Fri, May 17, 2024 at 10:45 AM, Petr Ourednik <indians@...> wrote: [Edited Message Follows] Joe, as Bryan said. They are specific by center frequency, in/out impedances, pinout and daughter board layout and finally size of the package. Anyway, some radios share the same filters... even across different manufacturers. Yaesu FT8xx uses as same filters as Yaesu FT-1000/1000MP, AOR 5000 or AOR 7030 or even TenTec Omni VII... Each manufacturer and seller often re-labeled Collins filter with own code and Aliases but they are still same Collins... These EMF filters are not as good as crystal filters, but they are still good performers in our radios. (even they are getting old and parameters are changing) 73 - Petr, OK1RP
Jeff WN1MB All Messages By This Member #114833 开云体育 Thank you very much, Petr. All good info! On 5/16/24 06:22, Petr Ourednik wrote: toggle quoted message Show quoted text Hi folks, I updated the document about the Collins mechanical filters for FT-8xx radios.? More Collins p/n and used aliases on the market added to the document including the real pictures as a proof. Hope it helps to someone, 73 - Petr, OK1RP
Ken N2VIP All Messages By This Member #114834 开云体育 I think the filter production process is non-trivial, and every year the market shrinks as the technology moves away from add-in filters. To my knowledge there are no radios in current production that accept add-in filters, so the market is shrinking as old radios die. Electronic replacements may be an option, but I feel the investment might never be recouped without charging non-ham friendly prices. Ken, N2VIP toggle quoted message Show quoted text On May 17, 2024, at 12:19, Joseph Wonoski via groups.io <N1khb@...> wrote: ?Thanks all for your response to my filter question. I should learn more about them. Maybe some enterprising soul will clone the Collins's units for the ham community. Joe N1KHB? On Fri, May 17, 2024 at 10:45 AM, Petr Ourednik <indians@...> wrote: [Edited Message Follows] Joe, as Bryan said. They are specific by center frequency, in/out impedances, pinout and daughter board layout and finally size of the package. Anyway, some radios share the same filters... even across different manufacturers. Yaesu FT8xx uses as same filters as Yaesu FT-1000/1000MP, AOR 5000 or AOR 7030 or even TenTec Omni VII... Each manufacturer and seller often re-labeled Collins filter with own code and Aliases but they are still same Collins... These EMF filters are not as good as crystal filters, but they are still good performers in our radios. (even they are getting old and parameters are changing) 73 - Petr, OK1RP
Petr Ourednik All Messages By This Member #114837 Ken, the hybrid SDR radios like Elecraft K4 or Yaesu FTDX-xxx are still using filtered roofers (as there is no better way how to protect ADC from overloading) but they are using crystal filters.? So you are right, that EMF units are dying slowly… :( -- 73 - Petr, OK1RP FT-817ND \| FT-818ND \| FT-857D?

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