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Re: TRX2A Main Board short diagnostic

Hi, Frank, You are right, there is no mention of this in the constructional notes I sent you, and indeed, to try and write a document to diagnose every fault is clearly impossible, there are just far too many variables to deal with. In this case you will have to try and discover what is drawing the ...
by 5B4AIY
31 May 2017 12:37
 
Forum: Juma Discussion
Topic: TRX2A Main Board short diagnostic
Replies: 5
Views: 1354

Re: TRX2A Main Board short diagnostic

Hi, Frank, You still have a problem. The major current consumption is by Q1 and Q2 on the receiver section if you have recent (Revision C) main board, or the Spur Elimination module if an older version. These two transistors consume about 13mA to 15mA each. the rest of the integrated circuits fed fr...
by 5B4AIY
31 May 2017 06:54
 
Forum: Juma Discussion
Topic: TRX2A Main Board short diagnostic
Replies: 5
Views: 1354

Re: TRX2A Which screws?

TRX2 Front Panel.JPG Hi, Frank, I am attaching a photo of the front panel of my Juma TRX-2. You will note that the DDS board is secured to the front panel by means of a threaded spacer, illustrated in your parts list, and identified as a 12mm M3 'spacer screw', which is secured to the DDS board. Th...
by 5B4AIY
22 May 2017 10:02
 
Forum: Juma Discussion
Topic: TRX2A Which screws?
Replies: 4
Views: 1254

Re: Problem with F-Sense not detecting Band

PA-100D - 2.jpg PA-100D - 1.jpg Hi, Attached are two images showing the PA-100D in the F-Sense mode displaying both the input frequency and power, and the AUTO Band Select Mode correctly selecting 14MHz, this is with version 3.00c Build 3 of my firmware, showing that the software is correct. The '?...
by 5B4AIY
22 Apr 2017 11:47
 
Forum: Juma Discussion
Topic: PA100-D Problem with F-Sense not detecting Band
Replies: 5
Views: 1362

Re: PA100-D updates

Hi, Roland, Yes, you can safely upgrade from your 1.05k, which is quite old now, to the most recent version, 3.00c/Build 3 - with one caveat - you must make a note of your existing calibration and configuration settings prior to loading this latest version. This is because of two factors, a. The EEP...
by 5B4AIY
19 Apr 2017 07:57
 
Forum: Juma Discussion
Topic: PA100-D updates
Replies: 6
Views: 1596

Juma TRX-2 v3.00a Build 24

OH8FIU has very kindly informed me of a bug in the previous build (23) of this firmware which fails to cancel the frequency offset from the RX mode when in TX. This affects the CW/CWR modes. My sincere apologies for this oversight on my part. Please go to my section of the website and download the n...
by 5B4AIY
11 Apr 2017 08:54
 
Forum: Juma Discussion
Topic: Juma TRX-2 v3.00a Build 24
Replies: 0
Views: 723

Re: Juma TRX-2 V3.00a Build 23

You are so right, I sincerely apologise to everyone for this oversight on my part, and thank you for bringing it to my attention. Build 23 has now been removed and replaced with Build 24 which fixes this problem. It was caused by a 'minor' movement of some code, but I omitted to include the offset c...
by 5B4AIY
11 Apr 2017 08:44
 
Forum: Juma Firmware by 5B4AIY
Topic: Juma TRX-2 V3.00a Build 24
Replies: 3
Views: 2443

Re: PA100-D Firmware update

Hi, Guntram, This error is because this dynamic link library file is missing from your computer, or has somehow been corrupted. I suggest you search the web, you will find a number of fixes available. Be careful about simply downloading this file from a strange web site as it could easily be infecte...
by 5B4AIY
09 Apr 2017 07:26
 
Forum: Juma Firmware by 5B4AIY
Topic: PA100-D Firmware update
Replies: 2
Views: 1363

Re: PA100-D Cable for Auto Band Detect

It is quite straightforward to get the PA-100D to automatically change bands when operating with the KX3 or the FT-817. There are two basic methods: 1. FREQENCY SENSE Select the F-SENSE mode in the User Configuration menu. With this mode selected the PA-100D will measure the frequency of the incomin...
by 5B4AIY
09 Apr 2017 06:34
 
Forum: Juma Discussion
Topic: PA100-D Cable for Auto Band Detect
Replies: 2
Views: 941

Re: PA100-D updates

Hi, Whitney, Whilst there are no 'official' PA-100D firmware updates, I have been modifying and enhancing the software for this amplifier for some time, and if you were to load my latest firmware, then you will indeed have the capability for the Elecraft KX3 to automatically control the amplifier. T...
by 5B4AIY
24 Mar 2017 09:19
 
Forum: Juma Discussion
Topic: PA100-D updates
Replies: 6
Views: 1596
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