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Re: TruSDX FTW

 

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Doug,

I assume you are talking about the USDX radio’s battery. The (tr)uSDX has no internal battery.
A charger came with my USDX. Since it is charging 11 V battery, ?I assume it is feeding 11-12V. I never measured it so it is just a guess. I will test it when I get home (I’m in Seattle now). The plug is smaller than the external 12-13.8V ?ps plug which is a common size.

Hiroki AH6CY
?




On Jun 9, 2024, at 16:12, Doug Hendricks <ki6ds1@...> wrote:

?On another topic how do you charge the internal battery?? What size plug, what is polarity?


Re: TruSDX FTW

 

On another topic how do you charge the internal battery?? What size plug, what is polarity?


Re: TruSDX FTW

 

Keeps the SD junction? voltage below 60v limit.? Diode conducts at 47v


Re: TruSDX FTW

 

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How does the diode protect against high SWR? What is the theory?

Hiroki AH6CY by



On Jun 9, 2024, at 14:57, Doug Hendricks <ki6ds1@...> wrote:

?It's the diode connected to the black connector at the top middle of the picture.? ?Do you see it now


Re: TruSDX FTW

 

It's the diode connected to the black connector at the top middle of the picture.? ?Do you see it now


Re: TruSDX FTW

 

good advice. Any chance you could resend one of those pictures with the component circled? ? that'll make it a little easier when I get home and dig through my 10,000 emails. If not, it's easy enough to figure out.

thanks again, Connie W6EFI



On Sun, Jun 9, 2024 at 14:18, Doug Hendricks <ki6ds1@...> wrote:
Connie and Hiroki,? it's a simple fix.? Just be sure to pay attention to diode band orientation.?

--
Connie KN2EFI


Re: TruSDX FTW

 

Connie and Hiroki,? it's a simple fix.? Just be sure to pay attention to diode band orientation.?


Re: TruSDX FTW

 


Re: TruSDX FTW

 

Lower left corner.?


Re: TruSDX FTW

 


Re: TruSDX FTW

 

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I blew the BS170 final transistors (set of 3) twice due to inadvertent high SWR and had to replace them. ?Fortunately, the replacements transistors are inexpensive.

Doug, when you say place 1n47576 between rf and ground, you mean rf antenna output to the ground?

Hiroki AH6CY







On Jun 9, 2024, at 08:51, Connie W6EFI via groups.io <stillinger@...> wrote:

?

Thanks for the tip– – I will look into this once I get back home. I'm glad I have a radio I feel ?comfortable just opening and modifying.

73,
Connie W6EFI


On Sun, Jun 9, 2024 at 07:57, Doug Hendricks <ki6ds1@...> wrote:
Connie,? I? strongly encourage you to install a 1N4756A diode between rf and ground.? It will? protect your finals.

Doug

--
Connie KN2EFI


Re: TruSDX FTW

 


Thanks for the tip– – I will look into this once I get back home. I'm glad I have a radio I feel ?comfortable just opening and modifying.

73,
Connie W6EFI


On Sun, Jun 9, 2024 at 07:57, Doug Hendricks <ki6ds1@...> wrote:
Connie,? I? strongly encourage you to install a 1N4756A diode between rf and ground.? It will? protect your finals.

Doug

--
Connie KN2EFI


Re: TruSDX FTW

 

Connie,? I? strongly encourage you to install a 1N4756A diode between rf and ground.? It will? protect your finals.

Doug


Re: I just put in my order for a KIO hex beam !

 

*keenly

lol



On Sat, Jun 8, 2024 at 10:49, Connie W6EFI via groups.io <stillinger@...> wrote:

I am following your adventures here, Kinley. Please keep us updated. I will probably copycat down the line.


On Sat, Jun 8, 2024 at 10:30, Joy Rabins <doghouse3@...> wrote:
We went to the city before I really got serious about ordering it. The city said "as long as it is for ham radio and is less than 35' high you don't need a permit". I have a printout from the city and the card of the city permit person that told us that.?

Dick did tell me a story yesterday of a guy that ordered some type of beam with all the other accessories and when he went to put it up in the city of Cupertino they wouldn't let him. Dick got a deal on a brand new Yaesu rotator when the guy was selling all the unused parts of his antenna project.?

Thanks for the heads up Doug,

Joy
N6GO

--
Connie KN2EFI

--
Connie KN2EFI


TruSDX FTW

 

I am on the road right now, currently in a hotel in Tehachapi. Last night I set up my truSDX connected to a small MFJ16010 tuner, then tossed a wire out into a tree from my balcony, and dropped counterpoise down to the ground. ?I plugged in a cheap straight key and a cheap pair of headphones, called CQ for about 2 min and?had a very nice CW qso with a guy in Sacramento. ??

The whole kit fits in my purse but I actually keep it in a small hand tool bag. ? this was a super proof of concept. The whole thing can come on the plane.

Thanks again to you all and the QRPops group for all of the information and encouragement!

Connie W6EFI

--
Connie KN2EFI


Re: I just put in my order for a KIO hex beam !

 


I am following your adventures here, Kinley. Please keep us updated. I will probably copycat down the line.


On Sat, Jun 8, 2024 at 10:30, Joy Rabins <doghouse3@...> wrote:
We went to the city before I really got serious about ordering it. The city said "as long as it is for ham radio and is less than 35' high you don't need a permit". I have a printout from the city and the card of the city permit person that told us that.?

Dick did tell me a story yesterday of a guy that ordered some type of beam with all the other accessories and when he went to put it up in the city of Cupertino they wouldn't let him. Dick got a deal on a brand new Yaesu rotator when the guy was selling all the unused parts of his antenna project.?

Thanks for the heads up Doug,

Joy
N6GO

--
Connie KN2EFI


Re: I just put in my order for a KIO hex beam !

 

We went to the city before I really got serious about ordering it. The city said "as long as it is for ham radio and is less than 35' high you don't need a permit". I have a printout from the city and the card of the city permit person that told us that.?

Dick did tell me a story yesterday of a guy that ordered some type of beam with all the other accessories and when he went to put it up in the city of Cupertino they wouldn't let him. Dick got a deal on a brand new Yaesu rotator when the guy was selling all the unused parts of his antenna project.?

Thanks for the heads up Doug,

Joy
N6GO


Re: I just put in my order for a KIO hex beam !

 

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It was really your input, Doug, that won the day at city hall. ?All I had to do was show them that Doug Hendricks had verified that the antenna height did not exceed city ordinance. ?Thanks for your help.

On Jun 7, 2024, at 10:53 AM, Doug Hendricks via groups.io <ki6ds1@...> wrote:

?Joy, if I were you, I would get the installation plans approved by the city of Sunnyvale.? ?Ask them for all rules and regulations concham radio antennas.? ?When you finish ask them to verify that your? installation is legal in the city of Sunnyvale.? ?Ask Dave Pollack.? He has experience dealing with this situation from an irate neighbor.? ?By the way, he won !!


No show today

 

Contrary to my earlier note, I will not make it to the Baylands at all today.
The delivery time of our new bed has been rescheduled for this afternoon. Have fun everyone.

Hiroki


Re: I just put in my order for a KIO hex beam !

 

Joy, if I were you, I would get the installation plans approved by the city of Sunnyvale.? ?Ask them for all rules and regulations concham radio antennas.? ?When you finish ask them to verify that your? installation is legal in the city of Sunnyvale.? ?Ask Dave Pollack.? He has experience dealing with this situation from an irate neighbor.? ?By the way, he won !!