Have a look at SOTABEAMS in the UK, they have various audio filter boards, some are build-ins some are external.
On Sun, Mar 3, 2024 at 8:22?AM Juan Jim¨¦nez < k1cpr@...> wrote: Interesting. Looks like I will pass on both for now. Is the TXCO crystal worth installing?
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 Jim¨¦nez 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?
>
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Press the DSP button on the top of the radio. Activate DNR by pressing the A/DNR key.
Press and hold the A key for one second tor recall DSP NR Level.
Adjust the DNR level and you should be able to hear a difference.
You could also use Key C to enable Band pass Filter and See "DSP BANDPASS FILTER (DBF)" section in your manual for adjusting the cutoff frequencies.
Leonard K. Pennock
AD7AS
Those who walk bravely through life, unafraid of loss or failure,
find that they very rarely lose or fail.
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On 3/3/24 8:20 AM, Juan Jim¨¦nez wrote: Oh! Well, that would explain it. How do I find out of mine is one of the ones with the DSP already on there?
73,
K1CPR
Juan
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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.
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On 3/3/24 8:21 AM, Juan Jim¨¦nez wrote: Interesting. Looks like I will pass on both for now. Is the TXCO crystal worth installing?
73,
K1CPR
Juan
|
Interesting. Looks like I will pass on both for now. Is the TXCO crystal worth installing?
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 Jim¨¦nez 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?
>
|
Oh! Well, that would explain it. How do I find out of mine is one of the ones with the DSP already on there?
Later 857 and all 857D had the DSP built in from the factory so there is
no option to install one.? If the DSP options (like DSP BPF WIDTH/CUTOFF
etc) work you already have the filter.
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 8:18 PM, Juan Jim¨¦nez wrote:
> I bought a used FT-8577 today, S/N 6K660152. I cracked it open to check
> for installed options and to my surprise, *there is no DSP-2 socket or
> switch!* Anybody have a clue what in the wide, wide world of sports is
> a-going on here?
>
> Also, it is worth installing the DSP-2 board on this radio?
>
>
>
> Juan
>
|
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
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On Mar 3, 2024, at 8:49?AM, Juan Jim¨¦nez <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?
|
Later 857 and all 857D had the DSP built in from the factory so there is no option to install one. If the DSP options (like DSP BPF WIDTH/CUTOFF etc) work you already have the filter.
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 8:18 PM, Juan Jim¨¦nez wrote: I bought a used FT-8577 today, S/N 6K660152. I cracked it open to check for installed options and to my surprise, *there is no DSP-2 socket or switch!* Anybody have a clue what in the wide, wide world of sports is a-going on here?
Also, it is worth installing the DSP-2 board on this radio?
Juan
|
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 Jim¨¦nez 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?
|
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?
|
I bought a used FT-857 today, S/N 6K660152. I cracked it open to check for installed options and to my surprise,? there is no DSP-2 socket or switch! Anybody have a clue what in the wide, wide world of sports is a-going on here? Also, it is worth installing the DSP-2 board on this radio?  Juan
|
A couple other things to note:
The service menu setting No. 017 - Vcc. It is factory set to "138" (13.8 volts applied to the FT897 power input). If your input voltage is something other than 13.8 volts and you don't change this setting before saving any other changes, the voltage displayed on the display will be incorrect. You need to measure the input voltage you are using with an accurate voltmeter and then change the No. 017 menu number to that for the displayed voltage to be correct. For instance, I am using a power supply set to 12.6 volts. I change the No. 017 menu number to "126." Then I save the service menu settings. Now my radio displays the correct input voltage, whatever it is.
Also, I have some microwave transverters which cannot use an input power level at the IF frequency of 144 MHz beyond about 2.5 watts. On 144 MHz, with the service menu settings calibrated according to the technical supplement, the lowest power the radio puts out is 5 watts with the normal menu setting 075, RF Power Set, set to 5. I really don't care much about the power settings if I can get the power out to be around 2 watts or lower. For my radio, setting the Service Menu No. 042, VHF-PO-MIN, to 0 produces a power output of 1.5 watts on 144 MHz with the main menu 075 set to 5. This is acceptable for my transverter. But this may be something most users aren't going to bother with.
Note, I am measuring all power levels with a Bird 43 wattmeter and the appropriate slugs.
73, Zack W9SZ
On Tue, Jan 23, 2024 at 4:20?AM HIRO, JJ1FXF < jj1fxf@...> wrote: I am reducing FT-857D MAX RF Power to 50W by the Service Menu for JA¡¯s mobile station application.
It would be very much appreciated if someone could answer my following questions.
1. For what do the MID2, MID1, MIN work?
2. Are there any other values of the Service Menu that I need to change when changing the RF power?
Thanks in advance.
73/88,
// HIRO, JJ1FXF
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Barron-san,
Thanks for your comment.
To use the homebrew radios or mod radios on the air, we need to verify the radios that they are compliant to the current regulations such as spurious emissions and limiting RF output, and then need to submit the evidences.
Hardware modifications with some photos are OK as the evidences but software configurations are hard to guarantee that the radios are compliant.
So I verified my 857D at an official lab and got a signed paper that my radio is compliant now.
JA regulations are a bit troublesome for amateur radio freaks, anyway. hihi
// HIRO, JJ1FXF
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I? am by no means an expert on Japanese radio regulations, but I believe that the radio needs to be recognized as an approved radio for the class of usage.?
I know that the Japanese radios are not generally as modifyable as the rest of the world radios, but in the setup memory there are settings to set the power levels in the US radios.
Perhaps these alignment menu would give you the ability to modify your radio for a maximum 50 watts?
At any rate I believe that modifying the radio would be difficult to get approved by the Japanese version of the FCC.
?
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As Ted-san said, JA¡¯s mobile station license is up to 50W and fixed station license is 1kW.
I¡¯m a fixed station and want to use the US 857D for my mobile license.
// HIRO, JJ1FXF
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Regarding the RF output, radio manufacturers here in Japan usually sell three types of the same HF radio, 10W, 50W and 100W.
As for the FT-857D, FT-857D is for 100W, FT-857DM is for 50W and FT-857DS is for 10W.
In the auction markets here, the most expensive used 857D is 857DM, 50W for mobile use.
// HIRO, JJ1FXF
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Re: Unable to send USING USB or any mode except DIG in FLDIGI
Ok Figured it out with help from DigiRig Forum.? I did invoke HAMLIB with nothing "Click" in the body  And this 
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Unable to send USING USB or any mode except DIG in FLDIGI
Running a FT-857D on Windows 10 using a Digi Rig as the interface. FLDIGI 4.2.03? I have tried other versions also
I can only send data if the radio is set to DIG,.? BUT when using Digital Master 780, ALE, Winlink (HF VARA) and many other software programs , I can send MODEs (Contestia 4/250 etc) and it works using USB.?
But when I use FLDIGI and? select USB, not tomes and I can hear my voice.? It is like VOX is active and it's not.? ?Why would FLDIGI operate this way?
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No, I didn¡¯t call directly, but I need to try.? Thank you!
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What are you talking about? Which RX8v?
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Seems to me hams in Japan operating portable or mobile are limited to 50 watts max, though I may be wrong. This is why some hams outside of Japan need to be cautious at buying a radio that was built for use in Japan.
On Mon, Feb 19, 2024 at 11:22, rifkum via groups.io <rifkum@...> wrote: Hi Hiro, JJ1FXF,
Curious as to why you are lowering the max RF power on your 857 to 50 watts??
I have been a member of this group for quite a while but have not followed the discussions as I haven't used my 857 in a couple of years so I may have missed the reasoning.
?
Is this to protect the 857 from some type of failure??
Thanks
73, N7KBC
Dwight
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Juan Jim¨¦nez
HIRO, JJ1FXF