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Re: Required power for AUTO Band sensing

Hi, I'm surprised that you think your amplifier needs at least 2 watts for the Frequency Sense logic to operate. I'm not sure which firmware you are using, but with my firmware the frequency sense logic will operate with as little as 100mW. Second, the design of the amplifier is such that the averag...
by 5B4AIY
18 Feb 2024 10:12
 
Forum: Juma Discussion
Topic: Required power for AUTO Band sensing
Replies: 1
Views: 121

Re: Remote Application for PA-100D

Indeed there is a remote control application for the PA-100D. I modified the firmware to incorporate a remote control feature for a Swiss amateur, and he produced the Windows remote control application many years ago, back in 2016. I am attaching it to this post. I do not actually need it myself, so...
by 5B4AIY
13 Dec 2023 11:55
 
Forum: Juma Discussion
Topic: Remote Application for PA-100D
Replies: 2
Views: 10929

Re: Juma TRX-2 Firmware Version 7.00a Build 3

In my software, if there is a major revision number change then typically this will indicate that the EEPROM mapping has changed, usually because I have added something to the map, and thus this will provoke a CRC checksum error on initial power up after the update. Normally I would include a warnin...
by 5B4AIY
16 Nov 2023 14:40
 
Forum: Juma Discussion
Topic: Juma TRX-2 Firmware Version 7.00a Build 3
Replies: 2
Views: 11970

Re: Juma TRX-2 Firmware Version 7.00a Build 3

Hi, Petr, You would only need to recalibrate the transceiver if, when loading the new firmware it showed a checksum error on initial power up, showing that the defaults have been loaded. This is why I provided a page in the User Manual where you can note your current calibration and configuration se...
by 5B4AIY
12 Nov 2023 07:11
 
Forum: Juma Firmware by 5B4AIY
Topic: Juma TRX-2 Firmware Version 7.00a Build 3
Replies: 2
Views: 8012

Simple Sequencer For The TRX-2/SPE Expert Linear

I have attached a note describing a simple sequencer to permit the Juma TRX-2 to drive a SPE Expert linear amplifier and avoid the RF glitch that can occur when using DATA modes. See the post in the 5B4AIY firmware section for full details.
Adrian 5B4AIY
by 5B4AIY
05 Sep 2023 06:20
 
Forum: Juma Discussion
Topic: Simple Sequencer For The TRX-2/SPE Expert Linear
Replies: 0
Views: 12302

Simple Sequencer For TRX-2 /SPE Linear Amplifier

When using the Juma TRX-2 to key a linear amplifier such as the SPE Expert series, because the TX/RX switching in the linear takes longer than the TRX-2 switching, it is possible to provoke a High SWR alarm from the transceiver. Version 7 of the firmware attempts to provide a software solution to th...
by 5B4AIY
05 Sep 2023 06:17
 
Forum: Juma Firmware by 5B4AIY
Topic: Simple Sequencer For TRX-2 /SPE Linear Amplifier
Replies: 0
Views: 4923

Juma TRX-2 Firmware Version 7.00a Build 3

There is now a new version of the Juma firmware, version 7.00a Build 3. This version add a TX Delay feature that may help when using the transceiver to drive a linear amplifier such as a SPE Expert. 04/09/23 Please note the slightly revised firmware. I accidentally uploaded a slightly different vers...
by 5B4AIY
03 Sep 2023 13:49
 
Forum: Juma Discussion
Topic: Juma TRX-2 Firmware Version 7.00a Build 3
Replies: 2
Views: 11970

Juma TRX-2 Firmware Version 7.00a Build 3

WARNING! THIS VERSION WILL CAUSE A CHECKSUM ERROR ON FIRST POWER UP BECAUSE THE EEPROM MAP HAS CHANGED. MAKE A NOTE OF YOUR CALIBRATION & CONFIGURATION SETTINGS PRIOR TO LOADING. 04/09/2023 I accidentally uploaded a slightly different version yesterday. The revised version is here. The only cha...
by 5B4AIY
03 Sep 2023 13:46
 
Forum: Juma Firmware by 5B4AIY
Topic: Juma TRX-2 Firmware Version 7.00a Build 3
Replies: 2
Views: 8012

Juma PA-100D v4.01a Build 3

There is now a new version of the firmware for the Juma PA-100D, which fixes a subtle page display logic bug. In the previous versions, if the band select mode was F-Sense, this mode has an extended display page that showed the frequency of the input signal to a resolution of 1kHz. If this page was ...
by 5B4AIY
26 Aug 2023 11:44
 
Forum: Juma Discussion
Topic: Juma PA-100D v4.01a Build 3
Replies: 0
Views: 11993

Juma PA-100D v4.01a Build 3

This build fixes a subtle bug in the page display logic. Previously if the band select mode was set to F-Sense, this allowed an additional page to be displayed that showed the frequency of the drive signal to a resolution of 1kHz. If, whilst this page was being displayed, the band select mode was ch...
by 5B4AIY
26 Aug 2023 11:39
 
Forum: Juma Firmware by 5B4AIY
Topic: Juma PA-100D v4.01a Build 3
Replies: 0
Views: 4145
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