开云体育

Filters

Juan Jiménez All Messages By This Member #53868 So, the manual talks about three filter boards for this radio but only two install spots are available. That means a choice has to be made. Which two of the three are the more worthwhile filters?
Leonard K. Pennock All Messages By This Member #53869 If you do CW, one of the narrow (500 or 300) filters can be a big help. Some Benefit on voice for the 2.3 Collins filter but debatable if it is worth the money. The internal Ceramic is a 2.4 but the Collins also has steeper skirts so helps with near channel rejection. Leonard K. Pennock AD7AS Those who walk bravely through life, unafraid of loss or failure, find that they very rarely lose or fail. toggle quoted message Show quoted text On 3/2/24 8:19 PM, Juan Jiménez wrote: So, the manual talks about three filter boards for this radio but only two install spots are available. That means a choice has to be made. Which two of the three are the more worthwhile filters?
Kent Trimble, K9ZTV All Messages By This Member #53871 开云体育 Juan ... The answer depends on your operating mode preferences and the availability of filters.? Preferring CW, my two slots are filled with Collins 300 and 500 mechanical filters in both my FT-897D and FT-857D. ?These filters are no longer attainable.? INRAD (Vibroplex) still shows a few filters for the FT-857D other than the 300 and 500. ?When it was suggested to W3PA (owner) that these two IF filters be manufactured as crystal rather than mechanical filters, he said they couldn't be made small enough to fit the radios. 73, Kent K9ZTV toggle quoted message Show quoted text On Mar 3, 2024, at 8:49?AM, Juan Jiménez <k1cpr@...> wrote: ?So, the manual talks about three filter boards for this radio but only two install spots are available. That means a choice has to be made. Which two of the three are the more worthwhile filters?
Juan Jiménez All Messages By This Member #53873 Interesting. Looks like I will pass on both for now. Is the TXCO crystal worth installing? 73, K1CPR Juan toggle quoted message Show quoted text On Sun, Mar 3, 2024 at 10:04?AM Leonard K. Pennock <leonardpennock@...> wrote: If you do CW, one of the narrow (500 or 300) filters can be a big help. Some Benefit on voice for the 2.3 Collins filter but debatable if it is worth the money.? The internal Ceramic is a 2.4 but the Collins also has steeper skirts so helps with near channel rejection. Leonard K. Pennock AD7AS Those who walk bravely through life, unafraid of loss or failure, find that they very rarely lose or fail. On 3/2/24 8:19 PM, Juan Jiménez wrote: > So, the manual talks about three filter boards for this radio but only > two install spots are available. That means a choice has to be made. > Which two of the three are the more worthwhile filters? >
Leonard K. Pennock All Messages By This Member #53874 For Voice and CW probably not radio is plenty stable without a TCXO. For Digital modes maybe. I would try and see if you have a drift issue before spending the money. Leonard K. Pennock AD7AS Those who walk bravely through life, unafraid of loss or failure, find that they very rarely lose or fail. toggle quoted message Show quoted text On 3/3/24 8:21 AM, Juan Jiménez wrote: Interesting. Looks like I will pass on both for now. Is the TXCO crystal worth installing? 73, K1CPR Juan
John All Messages By This Member #53876 Have a look at SOTABEAMS in the UK, they have various audio filter boards, some are build-ins some are external. toggle quoted message Show quoted text On Sun, Mar 3, 2024 at 8:22?AM Juan Jiménez <k1cpr@...> wrote: Interesting. Looks like I will pass on both for now. Is the TXCO crystal worth installing? 73, K1CPR Juan On Sun, Mar 3, 2024 at 10:04?AM Leonard K. Pennock <leonardpennock@...> wrote: If you do CW, one of the narrow (500 or 300) filters can be a big help. Some Benefit on voice for the 2.3 Collins filter but debatable if it is worth the money.? The internal Ceramic is a 2.4 but the Collins also has steeper skirts so helps with near channel rejection. Leonard K. Pennock AD7AS Those who walk bravely through life, unafraid of loss or failure, find that they very rarely lose or fail. On 3/2/24 8:19 PM, Juan Jiménez wrote: > So, the manual talks about three filter boards for this radio but only > two install spots are available. That means a choice has to be made. > Which two of the three are the more worthwhile filters? >
Juan Jiménez All Messages By This Member #53879 Ok. I don't do CW, just voice and digital, so I'll pass on that for now. Thanks again. 73, K1CPR Juan toggle quoted message Show quoted text On Sun, Mar 3, 2024 at 10:17?AM Kent Trimble, K9ZTV <k9ztv@...> wrote: Juan ... The answer depends on your operating mode preferences and the availability of filters.? Preferring CW, my two slots are filled with Collins 300 and 500 mechanical filters in both my FT-897D and FT-857D.? These filters are no longer attainable.? INRAD (Vibroplex) still shows a few filters for the FT-857D other than the 300 and 500.? When it was suggested to W3PA (owner) that these two IF filters be manufactured as crystal rather than mechanical filters, he said they couldn't be made small enough to fit the radios. 73, Kent K9ZTV On Mar 3, 2024, at 8:49?AM, Juan Jiménez <k1cpr@...> wrote: ?So, the manual talks about three filter boards for this radio but only two install spots are available. That means a choice has to be made. Which two of the three are the more worthwhile filters?
John D Erskine VE7MHI VA7OTC All Messages By This Member #53881 On 2024.03.03 07:21, Juan Jiménez wrote: Interesting. Looks like I will pass on both for now. Is the TXCO crystal worth installing? 73, K1CPR Juan If one were using the radio as an exciter with a transverter for higher bands, for such as EME, yes, I'd be tempted to put one in. Most folks dial about, and many of the modern data protocols display in a spectrumscope manner, sometimes with the software staying with another signal. So, horses for courses. 73, John - off to play in the ARRL Int'l DX SSB 'test -- John D Erskine VE7MHI VA7OTC CN88hk VA7RCN Victoria, B.C.

Previous Topic Next Topic