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Hi all. Has anyone tried the Chinese filters available on eBay for around $100?
If so do they work or should I just set fire to a $100 bill?
73
Kevin
K5KTM
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Those Murata filters are ceramic. Quite different from the Collins mechanicals.
Borja - EA2EKH
Fat fingers and tiny keys?
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On 16 Jun 2024, at 16:17, Kevin - K5KTM <Ktmullens@...> wrote:
?Hi all. Has anyone tried the Chinese filters available on eBay for around $100?
If so do they work or should I just set fire to a $100 bill?
73
Kevin
K5KTM
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Understood but do they work well enough to make a difference? I’m working on a budget and people are asking insane money for the Collins filters, be they OEM or Inrad.
Thanks
Kevin Mullens
K5KTM
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The Murata filters are similar to the internal filter in the radio. Probably a little tighter bandwidth but not near as good as the Collins mechanical filters. I'm not sure what the filter number is fr the internal filter but you could compare the specs for the internal Murata filter to the specs for the plug in Murata filters offered on Ebay and other sites. If I get a little time I will open my 817 and get the filter model? number so I can compare.
Pat, WA3UOE
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On 6/16/2024 11:23 AM, Kevin - K5KTM via groups.io wrote: Understood but do they work well enough to make a difference? I’m working on a budget and people are asking insane money for the Collins filters, be they OEM or Inrad.
Thanks
Kevin Mullens
K5KTM
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What’s the price difference?
Gig N2GIG
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On Jun 16, 2024, at 12:30, Pat Campbell <Wa3uoe@...> wrote:
The Murata filters are similar to the internal filter in the radio. Probably a little tighter bandwidth but not near as good as the Collins mechanical filters. I'm not sure what the filter number is fr the internal filter but you could compare the specs for the internal Murata filter to the specs for the plug in Murata filters offered on Ebay and other sites. If I get a little time I will open my 817 and get the filter model number so I can compare.
Pat, WA3UOE
On 6/16/2024 11:23 AM, Kevin - K5KTM via groups.io wrote:
Understood but do they work well enough to make a difference? I’m working on a budget and people are asking insane money for the Collins filters, be they OEM or Inrad.
Thanks
Kevin Mullens
K5KTM
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What's insane money?? Collins? is supposed to be good stuff..
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OK. The internal Murata filter is CFJ455K-14 (6 Db bandwidth of +- 1.1 - +- 1.3? kHz). The boards available for around $100.00 are CFJ455K-13. I cant find a data sheet on the -13 filter but descriptions from people selling the call them a 2.7 K bandwidth filter. If that is the case then they are a little wider than the internal filter so the audio may sound a little more natural? but a close in signal would cause more interference. I don't have one so I can't give a real world evaluation but I don't think I would spend $100.00 just to find out it's not any better than the built in filter.
Pat, WA3UOE
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On 6/16/2024 12:30 PM, Pat Campbell via groups.io wrote: The Murata filters are similar to the internal filter in the radio. Probably a little tighter bandwidth but not near as good as the Collins mechanical filters. I'm not sure what the filter number is fr the internal filter but you could compare the specs for the internal Murata filter to the specs for the plug in Murata filters offered on Ebay and other sites. If I get a little time I will open my 817 and get the filter model? number so I can compare.
Pat, WA3UOE
On 6/16/2024 11:23 AM, Kevin - K5KTM via groups.io wrote:
Understood but do they work well enough to make a difference?? I’m working on a budget and people are asking insane money for the Collins filters, be they OEM or Inrad.
Thanks
Kevin Mullens
K5KTM
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Is there a way to implement the MAX4581 IC to use as the filter? Around $2 plus some passive components.
Joe N1KHB?
On Sun, Jun 16, 2024 at 12:34 PM, Gigu chan <rudebwai@...> wrote: ? What’s the price difference? ? Gig? N2GIG > On Jun 16, 2024, at 12:30, Pat Campbell < Wa3uoe@...> wrote: > > The Murata filters are similar to the internal filter in the radio. Probably a little tighter bandwidth but not near as good as the Collins mechanical filters. I'm not sure what the filter number is fr the internal filter but you could compare the specs for the internal Murata filter to the specs for the plug in Murata filters offered on Ebay and other sites. If I get a little time I will open my 817 and get the filter model? number so I can compare. > > Pat, WA3UOE > > On 6/16/2024 11:23 AM, Kevin - K5KTM via groups.io wrote: >> Understood but do they work well enough to make a difference?? I’m working on a budget and people are asking insane money for the Collins filters, be they OEM or Inrad. >> >> Thanks >> Kevin Mullens >> K5KTM >> >> >> >> >> > > > > >
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There are a couple of videos on YouTube of them, one in particular has some halfway decent audio and I was able to hear a little difference. The mutants just sounded a little richer in audio. But if that’s all they have I think I will keep my money.
Thanks for the replies all.
73
Kevin Mullens
K5KTM
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At The Last Local? "Flea Market" I Noticed? TWO FT-817's one a ND and one a original? For Sale,? One? Full "Kit" on the "original" included all of the standard Items items even the whips, battery no filters and the asking price was $175, the second one a -ND only had the microphone and Battery, no filter, the owner indicated that he pulled the Collins filter and Sold it on the "Bay" he wanted $150 for he radio since he got $150 for the Filter. At the End of the Show I Offered $110 for the "Original" FT-817 and he accepted, I Now Have (3) FT-817's One "Original" with a SSB Filter, a -ND with a CW Filter and now the Original with No Filter but they ALL have all of the "Accessorizes"even the "plastic" carry sleeves.
Need to get a SCAF Filter and that will be enough for this One as it will be the "Patio" Radio,The "Original" is Easily Wide Banded via Software then Opening up the -ND to Solder.? ? ? ?
--? BTW The -ND was Holding out at $150.
Best Regards.
Steve AB2ET/4
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The only good filter is a cw one by Yaesu
The Yaesu SSB filter is a bit better. qRP ARCI has an article on them and the graph showed some tighter skirts but I found it wasn't worth $279 Canadian for it
The 2.7 Chinese one is too wide and I found it be useless on the 817 that had it
Maybe not the greatest contest radio but it's a great radio and I use mine everyday John VE3IPS?
-- John VE3IPS Radio is a Lifestyle not a Hobby Oprah added the ARRL Handbook to her list
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Thanks John. I don’t have much use for the CW filters as I am an SSB op. Haven't used CW since my test haha. I think I’m going to skip the filter entirely. Doesn’t seem to make enough difference to spend the money on it.
Kevin Mullens
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The resale price ?for CW filers for Yeasu and Collins is nuts. ?Some people are asking $400. That is the price of the radio. Supply a demand and the demand far outweighs the supply.
We need a solution in the $100 price range …
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Wasn't there a 3rd-party DSP board option at one time? While maybe not as good as OEM filters, they could be a reasonable option.
Were Yaesu/Collins filters EVER $100 options?
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On Jun 27, 2024, at 14:43, Ham Radio <bernard.murphy@...> wrote:
?The resale price ?for CW filers for Yeasu and Collins is nuts. ?Some people are asking $400. That is the price of the radio. Supply a demand and the demand far outweighs the supply.
We need a solution in the $100 price range …
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Ken See the Inrad post below and weep
Closeout pricing on roofing filter kits TS-850, TS-870, TS-930, TS-950, IC-756Pro, IC-756ProII, IC-756ProIII, IC-781
Closeout pricing while supplies last on roofing filter kits for TS-850, TS-870, TS-930, TS-950, IC-756Pro, IC-756ProII, IC-756ProIII, IC-781 transceivers. $69 plus shipping. At left click on Product by Radio under 'Categories' then enter either Icom or Kenwood to bring up the individual radio models list.
Closeout pricing on certain Heathkit, Icom, Kenwood, Yaesu filters for 1970-80's-era transceivers
A few models of INRAD filters for 1970's-80's era Heathkit, Icom, and Yaesu transceivers are now discontinued and remaining inventory is now sale priced at $40 each vs. usual retail of $118 to $174. For Heathkit: #2708 1.8 kHz SSB filter 3395 kHz I-F. For Icom: #113 2.1 kHz SSB filter for IC271, IC471, IC701, IC720/IC720A, IC1271. #320 1.8 kHz SSB for many Icom models. #322 1.8 kHz for many Icom models. For Yaesu FT-102 and FT-650: #1201.2 250 Hz CW filter, #1202.2 400 Hz CW filter. For Yaesu FT-102, FT757GX, FT767GX: #1209.1 2.1 kHz SSB filter. For Yaesu FT-101, FR-101: #2003 500 Hz filter, #2008 1.8 kHz filter. Kenwood TS-930/TS-930S roofing filter modification kit reg. $175, now $59. Quantities are limited. Type the model number into the search box at upper left to be taken to order pages.
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Sotabeams makes a DSP filter board, I believe that is what you are thinking of.
73
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Excuse me for butting in but I think what you may be looking for was made by W4RT. He is no longer in business. I have two FT-817’s that have his board in them. The board allows you to have a CW and SSB filter installed. W4RT used Collins filters on his board. These are very to find.
Robin W4IEN
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On Jun 27, 2024, at 17:12, Tobias KK7BCO/2M0TFF <feltusfecit1@...> wrote:
?Sotabeams makes a DSP filter board, I believe that is what you are thinking of.
73
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So the answer is "yes, they were once under $100" albeit as close out deals to clear out older filters for what are now 40-50 year-old radios...
Well, I did say 'ever' - I concede, LOL
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On Jun 27, 2024, at 15:34, Ham Radio <bernard.murphy@...> wrote:
?Ken See the Inrad post below and weep
Closeout pricing on roofing filter kits TS-850, TS-870, TS-930, TS-950, IC-756Pro, IC-756ProII, IC-756ProIII, IC-781
Closeout pricing while supplies last on roofing filter kits for TS-850, TS-870, TS-930, TS-950, IC-756Pro, IC-756ProII, IC-756ProIII, IC-781 transceivers. $69 plus shipping. At left click on Product by Radio under 'Categories' then enter either Icom or Kenwood to bring up the individual radio models list.
Closeout pricing on certain Heathkit, Icom, Kenwood, Yaesu filters for 1970-80's-era transceivers
A few models of INRAD filters for 1970's-80's era Heathkit, Icom, and Yaesu transceivers are now discontinued and remaining inventory is now sale priced at $40 each vs. usual retail of $118 to $174. For Heathkit: #2708 1.8 kHz SSB filter 3395 kHz I-F. For Icom: #113 2.1 kHz SSB filter for IC271, IC471, IC701, IC720/IC720A, IC1271. #320 1.8 kHz SSB for many Icom models. #322 1.8 kHz for many Icom models. For Yaesu FT-102 and FT-650: #1201.2 250 Hz CW filter, #1202.2 400 Hz CW filter. For Yaesu FT-102, FT757GX, FT767GX: #1209.1 2.1 kHz SSB filter. For Yaesu FT-101, FR-101: #2003 500 Hz filter, #2008 1.8 kHz filter. Kenwood TS-930/TS-930S roofing filter modification kit reg. $175, now $59. Quantities are limited. Type the model number into the search box at upper left to be taken to order pages.
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Ken
I had no idea that Google would find that InRad sale !
LOL
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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
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Kevin - K5KTM
Borja Marcos
John
Ham Radio
Tobias KK7BCO/2M0TFF