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eBay filters

Ron Wright All Messages By This Member #114963 I bought one of the Collins filters a few years back when I think RT Systems was selling them on the PCB to plug into my FT817.? Collins did make a very good filter, has very steep skirts? Mine is 300 Hz version.? Best accessory for the FT817 for I work most all CW.? Was plug and play, just needed to install by plugging in and then selecting in the menu. $400 is way too much, but can see $150 or little more since they are rare now.? Might make my FT817 that I have had since the 90s worth much more, hi. 73, ron, n9ee/r Ron Wright, N9EE/R Hernando Co ARES EC Spring Hill, Florida also n9ee55@... On Friday, June 28, 2024 at 06:50:26 AM EDT, Luis Miguel Casta?eda <octabod@...> wrote: On Thursday, June 27 2024, 15:25:37, Ken N2VIP via groups.io wrote: > Were Yaesu/Collins filters EVER $100 options? there are many options, perhaps not as evident as making a google search and picking the firsts results, but original collins filters of same characteristics are still available new as AOR parts. Mounting them on an aftermarket board puts it int he $100 range or slightly above it. Just search the archives. :) -- Americans detest all lies except lies spoken in public or printed lies. ? --- Edgar Watson Howe
Ken N2VIP All Messages By This Member #114965 开云体育 Ron, It would make your 30 year-old radio worth, about, $150 more... ;^) All this talk has me trying to remember what, if any, filters are in the FT-897 I picked up a while ago at a low price... Ken, N2VIP toggle quoted message Show quoted text On Jun 28, 2024, at 11:50, Ron Wright via groups.io <lt_wright_flg@...> wrote: Might make my FT817 that I have had since the 90s worth much more, hi. 73, ron, n9ee/r Ron Wright, N9EE/R Hernando Co ARES EC Spring Hill, Florida also n9ee55@...
Rod VA3MZD All Messages By This Member #114969 I bought one of these filters and put it in my FT-818. It’s the 2.7k version from eBay.? see I asked the same question about these way back before buying and there was a fascinating thread of responses. It might be worth reading through the thread if it can be located with a search. I’m not sure it made a significant difference but the radio definitely sounds a little quieter. During a Sunday night QRP SSB Net, I asked the 2 Net controllers located far apart in SC and IA to give me an audio report for my transmission when the filter was on and off. Both reported better audio with the filter on. For ~ $100, I felt it made a slight improvement, and I was not going to spend the big $$$ on the mechanical one, which was about half what I paid for the radio.
Rod VA3MZD All Messages By This Member #114970 My original query was in the FT-818 group but should be accessible here: /g/Yaesu-FT-818/topic/chinese_made_cy122_filter/100249352
John Biccum All Messages By This Member #114971 开云体育 A year ago I found one of the appropriate AOR-branded 300Hz Collins mechanical filters on the eBay Japan site for the ? equivalent of about $100. The seller, a Tokyo based AOR dealer, had just one filter, so I bought his last one. It arrived in an AOR box a week after placing the order. I sourced the requisite small printed circuit board from Artur (SP6AB). ?Artur was surprised I was asking him for a board since he hadn’t sold any in a while and since he believed that the global supply of the Collins mechanical filters had “long” ?been exhausted. He has “plenty” of the circuit boards available but has no leads on where one might find the Collins filters. My assembled filter that I am using in my FT-817ND is identical in fit and function to the Yaesu-branded filter I have in my FT-818ND. ?Artur shipped quickly and the boards (I bought two- one for a spare) arrived in Seattle from Poland in just a few days. ?I recommend his boards unconditionally. I have two suggestions for obtaining the Collins mechanical filter: ?1) Search e-Bay for the appropriate Collins part number (don’t use the Yaesu part number unless you want to buy the ~$300 assembled Yaesu filters).? 2) Search eBay and ham sites for the Yaesu part numbers corresponding to the genuine Yaesu filters for other Yaesu rigs that use the same Collins part numbers. You will find these Yaesu filters are assembled using a printed circuit board quite a bit larger than our FT-817/FT-818 filters. But the correct Collins filter can be un-soldered from the boards and re-soldered to one of Arthur’s boards. I reached Artur at the email address listed with his callsign. 73 de N7TIN toggle quoted message Show quoted text On Jun 28, 2024, at 10:31, Ken N2VIP <ken@...> wrote: ? Ron, It would make your 30 year-old radio worth, about, $150 more... ;^) All this talk has me trying to remember what, if any, filters are in the FT-897 I picked up a while ago at a low price... Ken, N2VIP On Jun 28, 2024, at 11:50, Ron Wright via groups.io <lt_wright_flg@...> wrote: Might make my FT817 that I have had since the 90s worth much more, hi. 73, ron, n9ee/r Ron Wright, N9EE/R Hernando Co ARES EC Spring Hill, Florida also n9ee55@...
Chris All Messages By This Member #115061 Hi, ? the choice of the bandwith has a lot to do with personal preferene. The cfj455k14 are often in reality around 2.2k kHz wide at -6dB. This can be desired in crowded band conitions. ? I prefer a SSB bandwith of 2.7 kHz and have in the past replaced this filter with the cfj455k13 on serveral rigs and not used the optinal filter slot. I find the audio much more pleasing. ? It is important to adjust the carrier offset in the service menu to get the optimum slice of the audio spectrum as the filters are variing in their center frequency. ? The downside of a wider filter is a bit more "monkey chatter" in a crowded band. ? Besides that, this filter defines the audio banwith of the tranmitted signal. ? You may want the better audio fidelity, or prfefer to concentrate your rf power on a smaller bandwidth to be more "punchier". ? Your rig, your choice. ? 73, Chris ?
Kevin - K5KTM All Messages By This Member #115064 开云体育 Thanks Chris Kevin Mullens K5KTM toggle quoted message Show quoted text On Aug 4, 2024, at 04:45, Chris via groups.io <csima@...> wrote: ? Hi, ? the choice of the bandwith has a lot to do with personal preferene. The cfj455k14 are often in reality around 2.2k kHz wide at -6dB. This can be desired in crowded band conitions. ? I prefer a SSB bandwith of 2.7 kHz and have in the past replaced this filter with the cfj455k13 on serveral rigs and not used the optinal filter slot. I find the audio much more pleasing. ? It is important to adjust the carrier offset in the service menu to get the optimum slice of the audio spectrum as the filters are variing in their center frequency. ? The downside of a wider filter is a bit more "monkey chatter" in a crowded band. ? Besides that, this filter defines the audio banwith of the tranmitted signal. ? You may want the better audio fidelity, or prfefer to concentrate your rf power on a smaller bandwidth to be more "punchier". ? Your rig, your choice. ? 73, Chris ?

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