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 RADIOHF - Drake R-4C IF Filters’ Switch Cover
- I’m looking for an IF filters’ switch cover found in the later version R-4C, in excellent or better condition. Please E-mail. Thank you.
- Listing #1744747 - Submitted on 09/30/25 by Callsign N4KZO - IP: 238.sub-174-196-133.myvzw.com
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 RADIOHF - INRAD #711 FILTER FOR SALE 
- INRAD #711 roofing filter pulled from working FT1000D. This filter is used in a variety of Yaesu, Elecraft and other radios. It is 8 pole, 1.8 khz bandwidth. Shipped to the lower 48 $60
- Listing #1741609 - Submitted on 09/01/25 by Callsign VE3NH, Modified on 09/29/25 - IP: 86.48.14.122
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- ANTHF - Baker & Williamson TVI Filter
- I have for Sale New Old Stock Barker & Williamson TVI Filter FL10/1500 watts Air Inductors just open the box take a picture only. are no guarantees other than it will not be DOA Do to scammers and part swappers sold as is no returns Ship to your Door in the continental USA only. Made in the good old USA asking $85.00. firm. Sorry No Pay Pal USPS Money Order or Personal Check after it clear the Bank
If need more information, Please E-Mail me if interested Thank for looking God Bless have great day 73'
- Listing #1740587 - Submitted on 08/22/25 by Callsign KA3ZQX, Modified on 09/28/25 - IP: syn-098-029-000-191.res.spectrum.com
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- RADIOHF - Elecraft K3 K3S KRX3 Sub Receiver - SALE
- ELECRAFT K3 K3S KRX3 SUBRECEIVER - OPTION -
$338 delivered check , Zelle, or PP FF ok.
$299 with a k3 or P3 purchase.
Or trade for something I can use ??
Removed from a working radio - see list of what you get :
SUBRECEIVER
DSP BOARD
MIXER BOARD
NOISE BLANKER BOARD
KNB3 SUBIN BOARD
KNB3 SUBOUT BOARD
4 TMP CABLES
HARDWARE
KSYN3 - Original version SYN board.
Please see pictures of everything included.
This is a stock picture,as I had 2 of these.
I think everything in this option kit is unavailable at this time from Elecraft,and may never be made again .
Will fit your K3 or K3S rig. If installing in a K3s, or a K3 with a newer SYN board,you will need to get a newer KSYN3A board.
I usually have these in a separate listing.
I think these were around $800 when available.
You will need to obtain filters if you need them,but they are easy.
I have them listed in a separate listing.
Happy to help you if you are not 100% sure how to do this !
Larry k6ro
- Listing #1743610 - Submitted on 09/19/25 by Callsign K6RO, Modified on 09/28/25 - IP: syn-067-253-101-060.res.spectrum.com
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- MISC - WTB YAESU XF-126CN CW Filter.
- Looking for 300Hz CW Filter for my FTDX-5000. Let me know what you have I can pay with PP G&S. TNX Steve K9CZ
- Listing #1744177 - Submitted on 09/25/25 by Callsign K9CZ, Modified on 09/26/25 - IP: c-73-176-100-46.hsd1.il.comcast.net
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- RADIOHF - Elecraft 400 HZ CW Filter - k3 k3s NEW !
- ELECRAFT K3 and K3S 400HZ CW and DATA Filter - KFL3A-400 -Brand New
$124.00 EA. Delivered - check, Zelle, PP FF ok.
This is the most popular filter that I sell.
If you want to add a CW filter to your K3 or K3S,this could be for you.
Pretty simple to install.
These were $169.99 on the Elecraft site before they discontinued them.
Buy it here for less :)
Please see pictures of everything included.
If you need other K3 radios or options,I probably have what you need.
I can be reached through email if you have questions about this unit.
Larry K6RO
- Listing #1744298 - Submitted on 09/26/25 by Callsign K6RO - IP: syn-067-253-101-060.res.spectrum.com
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- RADIOHF - Drake LP-1000 Low pass filter
- Drake LP-1000 lpow pass filter in excellent condition.Good for 1 KW up to 30 Mhz
$40.00 plus postage by Canada Post
- Listing #1744215 - Submitted on 09/25/25 by Callsign VE3AMZ - IP: host-97-107-61-168.pe.mccl.ca
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- RADIOHF - B&W Low pass filter
- B & W 425 Low pass filter in good condition works up to 30 Mhz at 1 KW $35.00 plus postage by Canada Post
- Listing #1744195 - Submitted on 09/25/25 by Callsign VE3AMZ - IP: host-97-107-61-168.pe.mccl.ca
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- RADIOHF - Elecraft K3 K3S Filters CW DATA SSB
- I have been asked to list which filters I have in stock.
Here we go:
200 HZ $85
250 HZ $120
400 HZ $84
500 HZ 5 pole $84
500 HZ 8 pole $125
1000 HZ $84
1500 HZ $85
1.8k $85
2.1K $95
2.7 SSB $ $85
2.8 SSB $95
6K AM $124
13K FM $129
Free usps shipping with Check, Zelle, PP FF .
on some of these I only have 1,and others 3-4.
Please email with questions,
Larry k6ro
- Listing #1735627 - Submitted on 07/10/25 by Callsign K6RO, Modified on 09/25/25 - IP: syn-067-253-101-060.res.spectrum.com
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- RADIOHF - Elecraft IRC 500 HZ CW Filter 8 pole k3
- ELECRAFT - IRC K3 and K3S 500HZ CW and DATA Filter - 8 POLE ! - PERFECT
I usually see 500 hz in 5 pole... so these are rare.
$129 each delivered - check, Zelle, PP FF ok.
If you want to add a CW filter to your K3 or K3S,this could be for you.
Pretty simple to install.
These were $169.99 on the Elecraft site before they discontinued them.
Buy it here for less :)
I will be listing Elecraft option boards and K3 radios very soon !
Please see pictures of everything included.
I can be reached through email if you have questions about this unit.
Larry K6RO
- Listing #1744149 - Submitted on 09/25/25 by Callsign K6RO - IP: syn-067-253-101-060.res.spectrum.com
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