[Elecraft] KX1 3080 Module High Current & Now No power Out

[Steve Watkins]

Don:

I rechecked that Pad E is connected to the proper point.  Prior to 
installing the LPF board, I made the checks on page 11 of the 3080 meter 
module and saw 5 vdc on Pad F as stated in the last step of Box 1.  I see 
from my notes that at this point I did record 47 ma in step 3 on page 11 vs. 
the suggested 34-37 ma.

I have lifted the wire from the bottom of the KX1 board that runs from Pad F 
and then to the + side of C9 to try and replicate what I was reading before 
the installation of the LPF board.

Here are the readings:

3.533 Mhz, Pad E = 6.3 mv, Pad F = 0.7 VDC, Pad D = 4.83 VDC

7.039 Mhz, Pad E = 5.01 VDC, Pad F = 0.2 mv, Pad D = 0.2 mv

6.710 MHz, Pad E = 5.01 VDC, Pad F = 0.2 mv, Pad D = 4.83 VDC

10.120 MHz, Pad E = 5.01 VDC, Pad F = 0.2 mv, Pad D = 4.9 VDC

14.100 MHz, Pad E = 5.01 VDC, Pad F = 0.2 mv, Pad D = 0.2 mv

All above readings on Pad 5 = 5 VDC

I'm considering removing the LPF board and going back to where I was after 
initial installation of the 3080 board, when I was getting the 5 VDC on Pad 
F on 80 meters... not sure what that will tell me, but it would be doing 
something hi hi.

Thanks, Steve
----- Original Message ----- 
From: "Don Wilhelm" <w3fpr at earthlink.net>
To: "Steve Watkins" <watti at charter.net>
Cc: <elecraft at mailman.qth.net>
Sent: Monday, May 21, 2007 8:40 PM
Subject: Re: [Elecraft] KX1 3080 Module High Current & Now No power Out


> Steve,
>
> Yes, when everything is working properly, you will have 5 volts on pad F 
> when on 80 meters.  What is the voltage on pad E when you are on 80 
> meters?  Make certain that you have pad E connected to the proper point 
> (see KXB3080 manual figure 7).  Pad E is the control, pad F is the output.
>
> 73,
> Don W3FPR
>
> Steve Watkins wrote:
>> Things have been going down hill this last weekend.
>>
>> Started with a bit higher current than manual stated on 80 meters (65 ma) 
>> to read about 105 ma.
>>
>> Then  I noted that I could not get any power out either.
>>
>> Rig was working fine with just the 20 and 40 meter module with currents 
>> and power out.
>>
>> I rechecked the voltages on page 11 of the KXB 3080 manual, and note now 
>> that on 80 meters, I no longer get 5 vdc on Pad F?.  I am now suspecting 
>> some problems on the 3080 module.
>>
>> I have checked numerous times for the obvious, especially those cautioned 
>> about in the errata.
>>
>> Maybe I haven't troubleshot this correctly, but it seems I should be 
>> seeing 5 vdc on Pad F through Q1 on 80 meters.
>>
>> Kind of floundering now and could use some bright mind input.
>>
>> Thanks, Steve
>