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Re: [Amps] Harbach metering board in SB-220

To: Louis Parascondola <gudguyham@aol.com>, amps@contesting.com
Subject: Re: [Amps] Harbach metering board in SB-220
From: Pete Smith N4ZR <n4zr@contesting.com>
Date: Sat, 08 Mar 2014 06:51:53 -0500
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Yes, but not yet - I e-mailed Jeff yesterday and he does not yet have the new boards or the resistors in stock.

73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
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On 3/7/2014 6:11 PM, Louis Parascondola wrote:
That board is being phased out.

    My board has 14 in a string.




-----Original Message-----
From: Pete Smith N4ZR <n4zr@contesting.com>
To: Louis Parascondola <gudguyham@aol.com>
Sent: Fri, Mar 7, 2014 4:42 pm
Subject: Re: [Amps] Harbach metering board in SB-220

My board has 14 in a string.
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
On 3/7/2014 8:47 AM, Louis Parascondola wrote:
Those resistors are almost never problematic. I would more likely suspect a poor solder connection or a swith problem. BTW....The new board has 3 resistors like the old style but the resistors are good quality. Makes assembly a lot easier.


-----Original Message-----
From: Pete Smith N4ZR <n4zr@contesting.com>
To: Louis Parascondola <gudguyham@aol.com>
Sent: Fri, Mar 7, 2014 8:31 am
Subject: Re: [Amps] Harbach metering board in SB-220

Yes, it reads grid current. I'm thinking that maybe we should assume the two problems *aren't* connected. I vaguely recall someone saying that the voltage multiplier resistors on the Harbach board are under-rated and therefore prone to failure - assuming I dig in there and discover that one or more are open, what would be an appropriate replacement? The value is a total of 14 meg.
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
On 3/7/2014 7:31 AM, Louis Parascondola wrote:
Does it read grid current? Often times when the wires are disturbed like when wiring a new board, you could have a bad wire or connection. Recheck the connections to the board on the yellow and orange wires. Also make sure no wires came off the switch or the meter to the board. They should have used strained wire. broken wires often the problem.


-----Original Message-----
From: Pete Smith N4ZR <n4zr@contesting.com>
To: Amps <Amps@contesting.com>
Sent: Fri, Mar 7, 2014 7:17 am
Subject: [Amps] Harbach metering board in SB-220

I am trying to understand a minor problem in my SB-220, which otherwise
works fine.  I originally installed the Harbach board because the HV was
reading low.  It fixed that, but quite quickly thereafter the HV
metering failed.  I *think* the relative power metering failed at the
same time, but can't remember for certain - a common cause is puzzling
because I can't see any commonality between the two circuits.

Can anyone help me identify components that are likely responsible?

--
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.

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