Re: 817ND power connector leaking voltage?
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Hi Pete, ? I think you¡¯ll find that that is normal. ? I just did a quick measurement on my ND and have about 2.38V showing on the input connector when the internal battery is connected. There is zero when it is disconnected. I have the Windcamp lithium pack in mine with the physical switch in the battery cover. ? If you have a look at the schematic, you¡¯ll see that there is a connection directly from the input plug to the trickle charge circuit which takes off prior to the main series diode, so that is most likely where the small bleed voltage is coming from. You¡¯ll find the input plug in the lower right corner of the main unit schematic and the charging circuits are above that, about half way up the schematic. ? 73¡.Eric VK2VE. ?
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From: [email protected] <[email protected]> On Behalf Of N1QDQ
Sent: Wednesday, 23 November 2022 15:16
To: [email protected]
Subject: [ft817] 817ND power connector leaking voltage?? I was working on a wiring harness for my 817ND/IC705 LEO setup and I found something odd. The 817ND power plug shows about 2.5v. I do have a NiMH pack installed and it behaves normally. I would not expect to see any rig voltage at the DC supply connector in a typical diode-controlled supply scenario. I'm using a Windcamp powerpole adapter but the voltage is there without it. Now I'm wondering if the previous owner had a reverse-polarity "incident" and the rig basically survived. Ideas?
Pete N1QDQ
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