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Author Topic: Filter Suggestions for my TS-440S?  (Read 4257 times)
K5VAH
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Posts: 19




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« on: September 02, 2012, 12:05:55 PM »

New to the amateur radio world and I am thinking of installing the optional filters in my Kenwood TS-440S/AT and would like to hear some experienced suggestions if possible. I see that there are possibly three SSB filters with different specs. They are YK-88S, YK-88S1, and YK-88SN. From what I understand the YK-88S is 2.4khz, YK-88S1 is 2.7khz, and YK-88SN is 1.8khz. The 440 requires them to be soldered in. I do not do much contesteing or get involved in pileups if that will be of help info wise. Also, what is the benefit of this 455kc AM filter that I see now and then?
73's
Vic
« Last Edit: September 02, 2012, 12:56:55 PM by K5VAH » Logged
W8JX
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Posts: 6047




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« Reply #1 on: September 02, 2012, 01:46:24 PM »

I have used 1.8 khz SSB narrow filter in any Kenwood rig that supports it.  When used there will be a little loss of fidelity at times it can be helpful with band is crowded. If you use IF shift you can optimize the audio in filter bandpass for best readability/fidelity. Would not bother with 2.7khz filter option. Never was a fan of HiFi audio on HF and I tend to avoid it.   
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K5VAH
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Posts: 19




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« Reply #2 on: September 02, 2012, 02:14:33 PM »

Thanks Mike for the input. I will certainly consider your experience.
73's Vic
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W9GB
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Posts: 2626




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« Reply #3 on: September 02, 2012, 03:32:06 PM »

2.4 kHz for SSB;  500 Hz for CW

Kenwood TS-440S was the largest selling solid-state SSB/CW transceiver from Kenwood.
However, I consider it to be a fair to poor AM mode radio.

IF you plan to be a regular AM operator, the 1950s / 1960s boatanchors are often a better selection.
« Last Edit: September 02, 2012, 03:36:23 PM by W9GB » Logged
K5VAH
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Posts: 19




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« Reply #4 on: September 02, 2012, 05:28:03 PM »

Thanks Greg for the insight. Not real concerned here about AM at this time but was just curious about the filter that I found. I am primarily interested in a good choice for a SSB filter for general listening.
Vic
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W8JX
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« Reply #5 on: September 03, 2012, 12:07:00 AM »

I am primarily interested in a good choice for a SSB filter for general listening.

Well stock filter will work fine for that and the narrow one if you want a edge when band is crowded.
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KB4QAA
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« Reply #6 on: September 04, 2012, 01:39:28 AM »

2.4khz and 500khz.
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K5VAH
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« Reply #7 on: September 04, 2012, 03:57:15 PM »

Thnx John and Bill. I think I have decided to go 2.4khz and 500hz. I want to thank all of you that have responded with good info and suggestions.
73's
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AD4U
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« Reply #8 on: September 10, 2012, 06:20:42 AM »

I have a 440 in my boat anchor collection.  The standard 2.4 SSB filter is good.  You can add a 2.1 or a 1.8 SSB filter, but as others have posted you will lose some fidelity in the receive audio.  Whether or not optional filters will be cost effective is up to each user.  Just do not expect miracles.

Dick  AD4U
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