Re: FT-817 almost powers up
with power plugged in ? --- yes.
If I remove the power and use the battery, the voltage readings seem correct.
In the original post I was measuring from the 817 case to the 13.8 line on the main board and getting 0v (because relative to the DC barrel, they are both 13.8? --? same potential)
b
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Re: Beginner's Guide to HF Amateur Radio- Week 2- HF Radios & Antennas
Here is link to the recording-?
On Thu, Oct 20, 2022 at 8:47 PM Anthony Luscre < k8zt73@...> wrote: Unfortunately, the message of the passcode change to RATPAC did not get out to everyone -
Hi Anthony;?
No way was I able to log into the 2nd week of Zoom; first week, no problem.? It kept asking me for the password which I understood as "WEDNESDAY".? But I will plan on watching it on YouTube.
73, Karl, KO8S in Michigan
On Thursday, October 20, 2022 at 02:26:07 PM EDT, Anthony Luscre < k8zt73@...> wrote:
Beginner's Guide to HF Amateur Radio- Week 2- HF Radios & Antennas watch the recording now-
Join us live for week 3 Oct 26-
View Week 1 Recording at [
-- Anthony Luscre
K8ZT Ohio Section Section Youth Coordinator & Education Outreach ARRL - The National Association For Amateur Radio? ?
The Web Resource Hoarder-
K8ZT Radio Website-
Amateur Radio Resources for Students/Youth -
--
Anthony Luscre
K8ZT Ohio Section Section Youth Coordinator & Education Outreach ARRL - The National Association For Amateur Radio? ?
The Web Resource Hoarder-
K8ZT Radio Website-
Amateur Radio Resources for Students/Youth -
-- Anthony Luscre
K8ZT Ohio Section Section Youth Coordinator & Education Outreach ARRL - The National Association For Amateur Radio? ?
The Web Resource Hoarder-
K8ZT Radio Website-
Amateur Radio Resources for Students/Youth -
|
Re: Beginner's Guide to HF Amateur Radio- Week 2- HF Radios & Antennas
Unfortunately, the message of the passcode change to RATPAC did not get out to everyone -
Hi Anthony;?
No way was I able to log into the 2nd week of Zoom; first week, no problem.? It kept asking me for the password which I understood as "WEDNESDAY".? But I will plan on watching it on YouTube.
73, Karl, KO8S in Michigan
On Thursday, October 20, 2022 at 02:26:07 PM EDT, Anthony Luscre < k8zt73@...> wrote:
Beginner's Guide to HF Amateur Radio- Week 2- HF Radios & Antennas watch the recording now-
Join us live for week 3 Oct 26-
View Week 1 Recording at [
-- Anthony Luscre
K8ZT Ohio Section Section Youth Coordinator & Education Outreach ARRL - The National Association For Amateur Radio? ?
The Web Resource Hoarder-
K8ZT Radio Website-
Amateur Radio Resources for Students/Youth -
-- Anthony Luscre
K8ZT Ohio Section Section Youth Coordinator & Education Outreach ARRL - The National Association For Amateur Radio? ?
The Web Resource Hoarder-
K8ZT Radio Website-
Amateur Radio Resources for Students/Youth -
|
Re: Beginner's Guide to HF Amateur Radio- Week 2- HF Radios & Antennas
Hi Anthony;?
No way was I able to log into the 2nd week of Zoom; first week, no problem.? It kept asking me for the password which I understood as "WEDNESDAY".? But I will plan on watching it on YouTube.
73, Karl, KO8S in Michigan
On Thursday, October 20, 2022 at 02:26:07 PM EDT, Anthony Luscre <k8zt73@...> wrote:
Beginner's Guide to HF Amateur Radio- Week 2- HF Radios & Antennas watch the recording now-
Join us live for week 3 Oct 26-
View Week 1 Recording at [
-- Anthony Luscre
K8ZT Ohio Section Section Youth Coordinator & Education Outreach ARRL - The National Association For Amateur Radio? ?
The Web Resource Hoarder-
K8ZT Radio Website-
Amateur Radio Resources for Students/Youth -
|
Re: FT-817 almost powers up
b,
Is the VOM reading with the power connector plugged into the FT817.
If you do then I would think the connector has lost it's connection to the FT817 ground/neg supply connection.? If not in the FT817 then I would be concerned if the cable connections are reversed and the fT817 has another path to ground.
73, ron, n9ee/r Ron Wright, N9EE/R Hernando Co ARES EC
Spring Hill, Florida also n9ee55@...
On Thursday, October 20, 2022 at 08:19:41 PM EDT, Denis Brown <kanekobrown1@...> wrote:
Hello Bill
I do not have a circuit (schematic) for the 817 here but I do know that the much earlier FT290 and FT690 had a reverse polarity diode in the negative pole of the DC power connector.
If the FT817 is similar, I would investigate the health of that, or any other, reverse polarity protection circuit / device.
Hope this helps
Denis VK6AKR
On Friday, October 21, 2022, Bill W1PA < w1pa@...> wrote: > Also, what fault would cause a VOM voltage reading of 13.8V from the DC barrel (-) to the 817 metal case?? (same radio)? Do I have a shorted cap? > > b
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Re: FT-817 almost powers up
Hello Bill
I do not have a circuit (schematic) for the 817 here but I do know that the much earlier FT290 and FT690 had a reverse polarity diode in the negative pole of the DC power connector.
If the FT817 is similar, I would investigate the health of that, or any other, reverse polarity protection circuit / device.
Hope this helps
Denis VK6AKR
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On Friday, October 21, 2022, Bill W1PA < w1pa@...> wrote: > Also, what fault would cause a VOM voltage reading of 13.8V from the DC barrel (-) to the 817 metal case?? (same radio)? Do I have a shorted cap? > > b > _._,_._,_ > ________________________________ > Groups.io Links: > > You receive all messages sent to this group. > > View/Reply Online (#113242) | Reply To Group | Reply To Sender | Mute This Topic | New Topic > Your Subscription | Contact Group Owner | Unsubscribe [ kanekobrown1@...] > > _._,_._,_
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Re: FT-817 almost powers up
Also, what fault would cause a VOM voltage reading of 13.8V from the DC barrel (-) to the 817 metal case?? (same radio)? Do I have a shorted cap?
b
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Beginner's Guide to HF Amateur Radio- Week 2- HF Radios & Antennas
Beginner's Guide to HF Amateur Radio- Week 2- HF Radios & Antennas watch the recording now-
Join us live for week 3 Oct 26-
View Week 1 Recording at [
-- Anthony Luscre
K8ZT Ohio Section Section Youth Coordinator & Education Outreach ARRL - The National Association For Amateur Radio? ?
The Web Resource Hoarder-
K8ZT Radio Website-
Amateur Radio Resources for Students/Youth -
|
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
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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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Anthony Luscre
Doc Sarvis
James Redding WA9VEZ