I have a 817 I am working on that I picked up at a flea.
- on battery, when POW-ON the display briefly starts (solid pattern on LCD) and shuts off (and I hear a relay click)
- on external power, the rig does nothing (and it appears there maybe short -- supply shuts off)
Anyone seen this before?? I probed around the power connector and it seems ok I also checked the MAIN board top and bottom and I don't see any craters. On battery, when I power up I seem to get a good 5V at the display before it shuts off. b
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James,
Thanks For The Information, Nice low cost Method.? Checked My Two FT-817 and I am Happy That The 4 year old China TCXO are Still in Specification, On the Other Hand the recently "Purchased " FT-817 with? NO TCXO (standard factory) is 197HZ OFF, I Did Order a TCXO for it from Ali as it was the best? cost/shipping compromise.
Best Regards.
Steve AB2ET/4
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Re: Watch "Testing Chinese HF linear amplifier DIY kits 70W SSB linear HF Power Amplifier For YAESU FT-817 KX3" on YouTube
On Thursday, October 20, 2022 at 10:37:09 AM EDT, Douglas Richards <ve3ffr@...> wrote:
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Looks like a decent kit. I think I'll go for it and get one. Thanx for all the replies and suggestions.
Dan KD3CEU
On Thursday, October 20, 2022 at 10:12:59 AM EDT, Ken N2VIP <ken@...> wrote:
A link would have been nice... Ken, N2VIP
On Oct 20, 2022, at 8:42 AM, Douglas Richards <ve3ffr@...> wrote:
Hi All
There is a youtube video
73
Douglas Richards VE3FFR
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Watch "Testing Chinese HF linear amplifier DIY kits 70W SSB linear HF Power Amplifier For YAESU FT-817 KX3" on YouTube
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A link would have been nice... Ken, N2VIP
toggle quoted message
Show quoted text
On Oct 20, 2022, at 8:42 AM, Douglas Richards <ve3ffr@...> wrote:
Hi All
There is a youtube video
73
Douglas Richards VE3FFR
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Easy way is to use WWV 10 or 15 mhz and tune down 1500 hz on LSB. That should make an audio tone with the radio tuned LSB to 9998500 (10 mhz) results at 1500 hz. Use one of many computer programs to measure the audio tones exact frequency.? While you might get a hertz or so variation due to the E propagation layer changing height, it should be "close enough".
Would probably be worth while to move to USB and tune to 10001500 to verify the results.
Jim/VEZ
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Hi All
There is a youtube video
73
Douglas Richards VE3FFR
On 10/20/2022 9:40 AM, Oz-in-DFW wrote:
I find it suspicious that there are no pictures of a completed
kit.
Don't be surprised if you find yourself in real life with an
unrelated collection of parts and zero chance of function.
But it's only 20 bucks with shipping.?
--
Oz (in DFW) N1OZ
--
73
Douglas Richards VE3FFR
ve3ffr@...
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I find it suspicious that there are no pictures of a completed kit.
Don't be surprised if you find yourself in real life with an unrelated collection of parts and zero chance of function.
But it's only 20 bucks with shipping.?
--
Oz (in DFW) N1OZ
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Hi Ronan,
Thanks for your input and excellent suggestions, sounds like you are a member of a great club, I will see what the local clubs offer. I know that the ARRL has a frequency test night once a year, so that's an option also.
Vy73,
Rick VE1RNM?
On Wed, Oct 19, 2022 at 11:46 PM, VE1RNM wrote:
So my question is how are you checking the frequency deviation of the Chinese tcxo-9s other than using another rig as a baseline.
Fortunately, my local radio club (CPSARC) run a "radio check" night where you can bring along your radios and have them tested for frequency accuracy, output purity and Rx sensitivity. They use some VERY nice and, more importantly, calibrated test equipment.?
Check if your local club do the same.
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On Wed, Oct 19, 2022 at 11:46 PM, VE1RNM wrote:
So my question is how are you checking the frequency deviation of the Chinese tcxo-9s other than using another rig as a baseline.
Fortunately, my local radio club (CPSARC) run a "radio check" night where you can bring along your radios and have them tested for frequency accuracy, output purity and Rx sensitivity. They use some VERY nice and, more importantly, calibrated test equipment.? Check if your local club do the same.
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On 2022-10-20 00:50, Doc Sarvis via groups.io wrote: Sorry for the brain fart...
<> Oh, one of these. One important thing to keep in mind about them is that they use transistors designed for use in switching-mode power supplies rather than "true" RF ones (hardly surprising given the price tag!), so while overall this kit performs decently enough do not expect wonders as you move up in the frequency. And as Dave has already remarked, you WILL need good low-pass filtering on the output. -- Marek M0JUR
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Show quoted text
On Oct 19, 2022, at 18:16, Doc Sarvis via groups.io <kd5ceu@...> wrote:
? Greetings to the group
Has anyone in the group purchased and built one of these kits? If so what is your opinion of it? Thanx.
Dan
KD3CEU
?
?
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Sorry for the brain fart...
On Wednesday, October 19, 2022 at 07:21:52 PM EDT, Don T via groups.io <satranger@...> wrote:
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Greetings to the group
Has anyone in the group purchased and built one of these kits? If so what is your opinion of it? Thanx.
Dan
KD3CEU
?
?
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Thanks Chris, That sounds like an excellent way to determine the deviation, I'm actually in the process of getting my raspberry Pi hooked up for wspr so once done, will pick one of the Chinese tcxo-9s and see what happens, perhaps I will get a good one also.
Regards from Pictou county Nova Scotia
Rick VE1RNM?
I am checking by transmitting WSPR beacons and see how it compares
with what signal it should be based on the audio frequencies that are
modulated in the passband.? It was on average only 1Hz off from the
expected frequency.? Many of these receivers have GPS disciplined
clocks that synthesize the waveforms used in the mixers and DSP
demodulators.? Therefore it is easy to know with a great degree of
precision what frequency you are transmitting added to the audio
"carrier" of the modulated message.
On Wed, Oct 19, 2022 at 3:47 PM VE1RNM <rickmoskovits@...> wrote:
>
> Hi Chris and greetings to the group,
>
> I've owned a ft817 early manufacture (2001)since purchase new and have been wanting to have the tcxo -9 but like many out there, can't quite handle the price....$160 plus shipping in Canada!
>
> So my question is how are you checking the frequency deviation of the Chinese tcxo-9s other than using another rig as a baseline. My ft1000mp mkv field is from 2004 so it has drifted a tiny bit so using it isn't an option.
>
> Any thoughts or suggestions would be very much appreciated.
>
> Vy73,
>
> Rick VE1RNM
>
> On Wed., Oct. 19, 2022, 9:56 a.m. Christopher Maness, <christopher.maness@...> wrote:
>>
>> Mine was 1Hz off, ?
>>
>> On Wed, Oct 19, 2022 at 2:29 AM Ronan Cantwell <ronancantwell@...> wrote:
>>>
>>> I've had one of the cheap Chinese TCXO in my radio for a while and it's been absolutely fine. It's possible, with a bit of patience and swearing, to tweak the frequency of these to within a few Hertz of spec. Well worth the few pounds spent.
>>>
>>> Now, if only they did cheap narrow CW filters on AliExpress ?
>>
>> --
>> Thanks,
>> Chris Maness
>> -Sent from my iPhone
>
>
--
Thanks,
Chris Maness
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I am checking by transmitting WSPR beacons and see how it compares
with what signal it should be based on the audio frequencies that are
modulated in the passband. It was on average only 1Hz off from the
expected frequency. Many of these receivers have GPS disciplined
clocks that synthesize the waveforms used in the mixers and DSP
demodulators. Therefore it is easy to know with a great degree of
precision what frequency you are transmitting added to the audio
"carrier" of the modulated message.
toggle quoted message
Show quoted text
On Wed, Oct 19, 2022 at 3:47 PM VE1RNM <rickmoskovits@...> wrote:
Hi Chris and greetings to the group,
I've owned a ft817 early manufacture (2001)since purchase new and have been wanting to have the tcxo -9 but like many out there, can't quite handle the price....$160 plus shipping in Canada!
So my question is how are you checking the frequency deviation of the Chinese tcxo-9s other than using another rig as a baseline. My ft1000mp mkv field is from 2004 so it has drifted a tiny bit so using it isn't an option.
Any thoughts or suggestions would be very much appreciated.
Vy73,
Rick VE1RNM
On Wed., Oct. 19, 2022, 9:56 a.m. Christopher Maness, <christopher.maness@...> wrote:
Mine was 1Hz off, ?
On Wed, Oct 19, 2022 at 2:29 AM Ronan Cantwell <ronancantwell@...> wrote:
I've had one of the cheap Chinese TCXO in my radio for a while and it's been absolutely fine. It's possible, with a bit of patience and swearing, to tweak the frequency of these to within a few Hertz of spec. Well worth the few pounds spent.
Now, if only they did cheap narrow CW filters on AliExpress ?
--
Thanks,
Chris Maness
-Sent from my iPhone
--
Thanks,
Chris Maness
|
Hi Chris and greetings to the group,
I've owned a ft817 early manufacture (2001)since purchase new and have been wanting to have the tcxo -9 but like many out there, can't quite handle the price....$160 plus shipping in Canada!
So my question is how are you checking the frequency deviation of the Chinese tcxo-9s other than using another rig as a baseline. My ft1000mp mkv field is from 2004 so it has drifted a tiny bit so using it isn't an option.
Any thoughts or suggestions would be very?much appreciated.
Vy73,
Rick VE1RNM?
I've had one of the cheap Chinese TCXO in my radio for a while and it's been absolutely fine. It's possible, with a bit of patience and swearing, to tweak the frequency of these to within a few Hertz of spec. Well worth the few pounds spent.
Now, if only they did cheap narrow CW filters on AliExpress ?
Thanks,
Chris Maness
-Sent from my iPhone
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Doc Sarvis
James Redding WA9VEZ