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Juma TX500 RX Converter

In my new built JUMA TX 500 I run into Problem. The RX Converter can be switch on / off. But when I try to activate Pre- Amplifier Gain it switches directly to 20dB, because Hi- level coming from Controller as switched to 10db or 20 dB Gain. Thats definitly wrong. The Signal is comming from Pin 35 (...
by dk1kq
10 Jan 2013 11:11
 
Forum: Juma Discussion
Topic: Juma TX500
Replies: 6
Views: 5893

JUMA TX 500 no HF Output ?

Hi,
just finished a TX 500 - but - no Power Output.
I seems to be, that the Signal "Buffer" is not generated which ist op Voltage for Buffer

Question: What is generating the +5 Voltage "Buffer" ? (Software)

73 uwe
by dk1kq
21 Aug 2012 13:02
 
Forum: Juma Discussion
Topic: JUMA TX 500 no HF Output ?
Replies: 1
Views: 2348

JUMA TX136/TX500 serial command and Query protokoll ?

... out from the documentaion is the query protocoll activated from the config page.

Question: how do I come into it ? Please explain !

73
Uwe
by dk1kq
11 Aug 2012 12:14
 
Forum: Juma Discussion
Topic: JUMA TX136/TX500 serial command and Query protokoll ?
Replies: 0
Views: 1332

Re: Juma TX500 Terminal Programm ?

In Order to programm the JUMA TX 500 ( Also TX 136) a Terminal programm is needed
Programming EEPROM
Dont have my old W98 anymore

What Terminal - Programm would work with XP or W7

I am not talking about the JUMA TX136 & TX500 control software !


73
Uwe
by dk1kq
10 Aug 2012 10:06
 
Forum: Juma Discussion
Topic: Juma TX500
Replies: 6
Views: 5893

Re: Juma TX500

This failure is caused by overcurrent.
(IC7 MAX 4373TESA) is generating FAULT. After removing Overcurrent it should generate Overcurrent RESET/not
(in my case it did not)

73
Uwe, DK1KQ
by dk1kq
10 Aug 2012 10:01
 
Forum: Juma Discussion
Topic: Juma TX500
Replies: 6
Views: 5893

Re: JUMA TX500 Freq. Accuracy

The Reason for this big difference : Cable J2-not good fabricated - therfore No data from PIC to DDS
small correction can be done in Service mode (PWR+Display (Set Ref Osc Freq) 6000000 +/-
Uwe DK1KQ
by dk1kq
10 Aug 2012 09:54
 
Forum: Juma Discussion
Topic: JUMA TX500 Freq. Accuracy
Replies: 1
Views: 1815

Re: JUMA TX500 Reset - how ?

Should say RFM
Politly
PUSH PWR and Display/ Conf together
Then long push Display /conf long

uwe, DK1KQ
by dk1kq
10 Aug 2012 09:49
 
Forum: Juma Discussion
Topic: JUMA TX500 Reset - how ?
Replies: 1
Views: 1770

Juma TX500

Hi struggling with failure
on LCD Display "CURR" is blinking with short beeps.
What is causing this indication?
Uwe is asking
73
by dk1kq
06 Aug 2012 15:29
 
Forum: Juma Discussion
Topic: Juma TX500
Replies: 6
Views: 5893

JUMA TX500 Freq. Accuracy

Hi,
Just finished a TX 500.
To my surprise., the XMit Frequency is 13 KHz lower as indicated.
Question: can this offset in the service mode be adjusted ? - How ?

73
Uwe, dk1kq
by dk1kq
02 Aug 2012 17:56
 
Forum: Juma Discussion
Topic: JUMA TX500 Freq. Accuracy
Replies: 1
Views: 1815

JUMA TX500 Reset - how ?

How can a RESET be done ?

vy 73 Uwe, DK1KQ
by dk1kq
30 Jul 2012 12:24
 
Forum: Juma Discussion
Topic: JUMA TX500 Reset - how ?
Replies: 1
Views: 1770
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