Search found 175 matches

Return to advanced search

Re: JUMA 100D with LDG AT-100 ProII

Hi, Greg, There are several ways to avoid this high SWR trip. The first is to match the antenna using the transceiver's power with the amplifier in the STANDBY mode, and then switch to the OPERATE mode. It is always somewhat risky to match the antenna with an auto-tuner with the linear operating at ...
by 5B4AIY
13 Jan 2019 09:14
 
Forum: Juma Firmware by 5B4AIY
Topic: JUMA 100D with LDG AT-100 ProII
Replies: 2
Views: 129

Re: Juma PA100-D auto band tracking

Hi, Guntram, Let's see if we can find out what is wrong. If you have my version of the firmware loaded, then there are a couple of tests in the Serial Test Suite that will help. In the User Configuration menu ensure that you have the Frequency Sense mode selected. Also, ensure that the serial port m...
by 5B4AIY
02 Jan 2019 10:58
 
Forum: Juma Discussion
Topic: Juma PA100-D auto band tracking
Replies: 2
Views: 91

Re: Juma TRX2A - new purchase

And when you have finished, why not give my firmware a try? The latest version is available on this website. If you need any assistance there are plenty of us available to provide help.
73, Adrian, 5B4AIY
by 5B4AIY
11 Dec 2018 07:47
 
Forum: Juma Discussion
Topic: Juma TRX2A - new purchase
Replies: 4
Views: 184

Re: JUMA 100D Firmware Update

Hi Greg, Glad that you have managed to load the new firmware. As for calibrating the frequency counter, refer to the instructions on page 18 of the User Manual. With an input power of 100mW to 5W, not critical, inject an accurately known CW signal on 10m. I suggested the default Juma TRX-2 10m band ...
by 5B4AIY
04 Dec 2018 07:11
 
Forum: Juma Firmware by 5B4AIY
Topic: JUMA 100D Firmware Update
Replies: 14
Views: 357

Re: JUMA 100D Firmware Update

Hi, Greg, Excellent! Yes, in order to access the test commands the RS-232 port has to be in the TEST mode. I apologise if I did not make this clear. I am relieved that there were no hardware problems, removing chips and replacing them is a difficult job and involves the risk of seriously damaging th...
by 5B4AIY
01 Dec 2018 14:18
 
Forum: Juma Firmware by 5B4AIY
Topic: JUMA 100D Firmware Update
Replies: 14
Views: 357

Re: JUMA 100D Firmware Update

Hi, Greg, Obviously it's now time to get really serious. It has been more than 7 years since I last used the original firmware, but looking through my firmware archive the amplifier with the original firmware should respond to the following commands: Command: I Response: The message: JUMA-TRX2 copyr...
by 5B4AIY
29 Nov 2018 14:02
 
Forum: Juma Firmware by 5B4AIY
Topic: JUMA 100D Firmware Update
Replies: 14
Views: 357

Re: JUMA 100D Firmware Update

Hi, Greg, One other suggestion. We need to be absolutely sure that there really is data going to the PA-100D. To verify this we need to loop the TX DATA to the RX DATA line of your USB-RS-232 converter. Then when you send something from your terminal program it should be immediately echo'ed back. So...
by 5B4AIY
29 Nov 2018 07:04
 
Forum: Juma Firmware by 5B4AIY
Topic: JUMA 100D Firmware Update
Replies: 14
Views: 357

Re: JUMA 100D Firmware Update

Hi, Greg, This is a puzzle! Before you try and replace the MAX232 chip, it's wise to see if it is working. The old RS-232 standard inverted the data, so on the PA-100D TX Data side a +5V TTL signal is a logic '1' and this should indeed result in a -9V output signal on the TX DATA line, similarly a -...
by 5B4AIY
28 Nov 2018 13:10
 
Forum: Juma Firmware by 5B4AIY
Topic: JUMA 100D Firmware Update
Replies: 14
Views: 357

Juma TRX-2 v5.00a Build 6

Juma TRX-2 firmware version 5.00a Build 6 optimises the operation of the transceiver when equipped with the new active roofing filter. This filter was introduced a few years ago, and improves the performance compared to the original by having narrower bandwidths, steeper skirts, and greater stop ban...
by 5B4AIY
28 Nov 2018 12:37
 
Forum: Juma Firmware by 5B4AIY
Topic: Juma TRX-2 v5.00a Build 6
Replies: 0
Views: 151

Re: JUMA 100D Firmware Update

Hi, Greg I'm sorry to hear that you are having a problem, let's see if we can determine the cause. To answer your questions, -6.3V for the TX Data line from your USB-RS232 converter is perfectly OK. I have measured the voltage from several of these converters, and both the FTDI and Prolific chipsets...
by 5B4AIY
25 Nov 2018 07:16
 
Forum: Juma Firmware by 5B4AIY
Topic: JUMA 100D Firmware Update
Replies: 14
Views: 357
Next

Return to advanced search

cron