Just received my 500HZ filter from INRAD. They still have filter stock so the filters are available for $140.
Harvey, WA2AAE
|
Rick, Excellent question! At Present the Best alternative is the SotaBeam unit, a bit tricky (for older eyes ) to install but equivalent to the W4 board. With a 3000mAh battery the setup is best for power. The cost in comparison in getting a "Collins" is actually minima.l
If you are not at ease in doing the install I am sure that a enterprising ham can be found (in the States) that can do it reasonably.
I have one installed in Salvaged third 817 she was a Basket Case Flea Market $50 that needed a final board and some tender care,performance is better then my 817 with a Collins CW filter.
Regards. Steve AB2ET/4
Living the Life
---In FT817@..., <rmckee1957@...> wrote : What good would it do to have the board if the filters are no longer available ?
Rick KC8AON
|
Inrad is still in biz...Hal/WB4AEG
|
But some of us have filters.
Andy GD1MIP
|
What good would it do to have the board if the filters are no longer available ?
Rick KC8AON
|
Thanks all, I'll write an email and see what happens.
Andy GD1MIP
|
I have some blank boards.? I'd be willing to photograph one, provided someone can point to a way to get permission to copy it from the original designer.? I've no desire to get involved in a dispute over rights.
Vy73 -- Mike -- DL/KD5KC
Rhon Mountains
Strahlungen Germany
On Tue, Jun 18, 2019 at 7:13 AM -0600, "gd1mip@... [FT817]" <FT817@...> wrote:
Now that W4RT has ceased trading, has anyone tried to copy / replicate the PCB?
Or if you have an unused board would you be willing to make the appropriate images so one could be made?
Thanks Andy GD1MIP
------------------------------------
Posted by: gd1mip@...
------------------------------------
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Please note that your messages and files sent to this group may appear anywhere on the Internet or in print without notice or compensation.
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There should definitely be a resolution of the board's copyright
before simply copying it.
According to QRZ.com, W4RT is a club call.? Start there...
Greg? KO6TH
'Eric van de Weyer' evdw@...
[FT817] wrote:
toggle quoted message
Show quoted text
?
Hi Andy,
?
I would suggest that, if W4RT
is not SK, then he should be approached and asked for
permission to replicate his board or, failing that his
family should be asked for the permission.
?
He may be willing to provide
the layout of the board to a successor to manufacture
which would simplify the process.
?
?
From: FT817@...
Sent: Tuesday, 18 June 2019 23:13
To: FT817@...
Subject: [FT817] W4RT Dual filter PCB
?
?
Now that W4RT has ceased trading, has anyone
tried to copy / replicate the PCB?
Or if you have an unused board would you be
willing to make the appropriate images so one
could be made?
Thanks Andy GD1MIP
|
Hi Andy, ? I would suggest that, if W4RT is not SK, then he should be approached and asked for permission to replicate his board or, failing that his family should be asked for the permission. ? He may be willing to provide the layout of the board to a successor to manufacture which would simplify the process. ? ?
toggle quoted message
Show quoted text
From: FT817@...
Sent: Tuesday, 18 June 2019 23:13
To: FT817@...
Subject: [FT817] W4RT Dual filter PCB? ? Now that W4RT has ceased trading, has anyone tried to copy / replicate the PCB?
Or if you have an unused board would you be willing to make the appropriate images so one could be made?
Thanks Andy GD1MIP
|
Now that W4RT has ceased trading, has anyone tried to copy / replicate the PCB?
Or if you have an unused board would you be willing to make the appropriate images so one could be made?
Thanks Andy GD1MIP
|
Hi all
I buy both Collins filters some years ago and I found on web that there is another way to have both Collins filters installed without any pcb.
I did this simple wire installation and it's working
73 mike i3mdu
|
P.S. Linear Technology and Texas Instruments for audio filter ICs as well. One can also homebrew multipole as many orders as needed as Chebyshev, Butterworth, etc. with op amps.
Joe
On Monday, June 17, 2019 Joseph Wonoski N1KHB <FT817@...> wrote:
?
Are we talking about IF or audio filters? Are Murata filters a candidate?? It seems to me that National Semiconductor made an IC audio filter left to the user for setting characteristics with passives.
Joe
N1khb
On Monday, June 17, 2019 rmckee1957 <FT817@...> wrote:
?
Been thinking of getting the Sotabeam filt for my 817, anyone here use one ?? How well does it work ?
Rick KC8AON
---In FT817@..., wrote : There is another filter option that doesn't get mentioned often:??
As I understand it, this is an AF not IF filter that is extremely
effective.? Like any other internal modification to your radio, you need
to be comfortable with a fine-tip soldering iron and be willing to void
your (mostly worthless) warranty.
For those in the US, DX Engineering resells almost all of the SotaBeams products.
Disclaimers:?
I have a business relationship with SotaBeams and can stand behind the
quality of their business.? I am not being compensated for this
comment.? I have not used this filter but would be seriously considering
it myself if I had a radio that needed a filter.? It might not work
with a FT-818 - I don't believe anyone has tested it yet.
jon N0WL
|
Are we talking about IF or audio filters? Are Murata filters a candidate?? It seems to me that National Semiconductor made an IC audio filter left to the user for setting characteristics with passives.
Joe
N1khb
On Monday, June 17, 2019 rmckee1957 <FT817@...> wrote:
?
Been thinking of getting the Sotabeam filt for my 817, anyone here use one ?? How well does it work ?
Rick KC8AON
---In FT817@..., wrote : There is another filter option that doesn't get mentioned often:??
As I understand it, this is an AF not IF filter that is extremely
effective.? Like any other internal modification to your radio, you need
to be comfortable with a fine-tip soldering iron and be willing to void
your (mostly worthless) warranty.
For those in the US, DX Engineering resells almost all of the SotaBeams products.
Disclaimers:?
I have a business relationship with SotaBeams and can stand behind the
quality of their business.? I am not being compensated for this
comment.? I have not used this filter but would be seriously considering
it myself if I had a radio that needed a filter.? It might not work
with a FT-818 - I don't believe anyone has tested it yet.
jon N0WL
|
I have an ND with the sotabeams filter, it is installed so a Collins filter can be run parallel with it and I find it very comparable to the Collins on CW. The slopes of the filters must be similar because to my ear they have almost the same sound.
Depending on your use case it may be a good option.
The Sotabeams is always in-line either using the wide or narrow setting. And since it is a dsp audio filter it is always in series with the stock ceramic filter on receive.
Ultimate rejection of closed space signals probably would still be a good case for the Collins filters but for just general use I think the sotabeams is very usable.
The only interest I have in any of the equipment is as an owner but I do have an 817nd on QRZ for sale with the sotabeams filter installed right now.
73 KV4TT- Mike
|
Hi all:
Another option as an audio DSP unit is the Funtronics ADSP filter:
It receives mixed reviews on eham.net, I have one, and must say that, on SSB, it works pretty well; on CW, it is finicky, but usable. Still no match for my TS590S, though!
Stephen KI9S
On Monday, June 17, 2019, 3:30:50 PM EDT, jonpoland@... [FT817] wrote:
?
There is another filter option that doesn't get mentioned often:?
?
As I understand it, this is an AF not IF filter that is extremely
effective.? Like any other internal modification to your radio, you need
to be comfortable with a fine-tip soldering iron and be willing to void
your (mostly worthless) warranty.
For those in the US, DX Engineering resells almost all of the SotaBeams products.
Disclaimers:?
I have a business relationship with SotaBeams and can stand behind the
quality of their business.? I am not being compensated for this
comment.? I have not used this filter but would be seriously considering
it myself if I had a radio that needed a filter.? It might not work
with a FT-818 - I don't believe anyone has tested it yet.
jon N0WL
|
Been thinking of getting the Sotabeam filt for my 817, anyone here use one ?? How well does it work ?
Rick KC8AON
---In FT817@..., <jonpoland@...> wrote : There is another filter option that doesn't get mentioned often:??
As I understand it, this is an AF not IF filter that is extremely
effective.? Like any other internal modification to your radio, you need
to be comfortable with a fine-tip soldering iron and be willing to void
your (mostly worthless) warranty.
For those in the US, DX Engineering resells almost all of the SotaBeams products.
Disclaimers:?
I have a business relationship with SotaBeams and can stand behind the
quality of their business.? I am not being compensated for this
comment.? I have not used this filter but would be seriously considering
it myself if I had a radio that needed a filter.? It might not work
with a FT-818 - I don't believe anyone has tested it yet.
jon N0WL
|
There is another filter option that doesn't get mentioned often:?
?
As I understand it, this is an AF not IF filter that is extremely
effective.? Like any other internal modification to your radio, you need
to be comfortable with a fine-tip soldering iron and be willing to void
your (mostly worthless) warranty.
For those in the US, DX Engineering resells almost all of the SotaBeams products.
Disclaimers:?
I have a business relationship with SotaBeams and can stand behind the
quality of their business.? I am not being compensated for this
comment.? I have not used this filter but would be seriously considering
it myself if I had a radio that needed a filter.? It might not work
with a FT-818 - I don't believe anyone has tested it yet.
jon N0WL
|
You're totally correct.? W4RT closed their doors over a year ago.? They sold off all the filter kits, then offered up the bare boards last.? I bought up a few for "FUTURE NEEDS".? AFAIKT, nothing more is available from W4RT.
I have installed the dual-filter kit in two FT-817NDs, and one ICOM IC-703+.? I luv em, and now my German nephew is begging me to a a bare board.? He did his first SOTA activation, and fell in love with the Collins SSB filter, but he also sees the need for the CW filter.? Like me, he wants both.
Vy73 -- Mike -- DL/KD5KC
Rhon Mountains
Strahlungen Germany
On Thu, Jun 13, 2019 at 6:04 PM -0600, "john bucsek pwyll99@... [FT817]" <FT817@...> wrote:
For the most part the filters are all made by Collins (and are no longer in production), so all the options go back to the same basic filter.? The various retailers mount the filter on a board suitable for your rig. For me, inrad has been a good source when I couldn't find a used filter on ebay. I dont think W4RT is still in business (correct me of I'm wrong) and they were the one who made the board that let you use 2 filters on the 817.
Hope that helped.
John - KE7WNB?
|
For the most part the filters are all made by Collins (and are no longer in production), so all the options go back to the same basic filter.? The various retailers mount the filter on a board suitable for your rig. For me, inrad has been a good source when I couldn't find a used filter on ebay. I dont think W4RT is still in business (correct me of I'm wrong) and they were the one who made the board that let you use 2 filters on the 817.
Hope that helped.
John - KE7WNB?
|
Brian,
I forgot to ask...Have you tried listening on the AM or FM broadcast band?? With an antenna connected you should hear those bands fairly well.? You have to enable the AM/FM dial in Menu item 04.
Al
WB9UVJ
|
Hal Dale
Andy GD1MIP
Al WB9UVJ