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Re: TRX2A L4 blowed

Now more than 6 months later, I am here again in QTH TA3 with replacemets. Mounted: - new R11/R12 (0R22) - new TR2/TR3 (IRFR110) - R6/R9/R15/R18 to 0 - tested all over C5/C7/C12/C14 (1-3 Ohms) Started very slowly (yes) to turn R6 clockwise and watched for the current. -- nothing to see for abt. 5 tu...
by HB9FIH
14 Jun 2017 21:02
 
Forum: Juma Discussion
Topic: TRX2A L4 blowed
Replies: 11
Views: 4477

Re: TRX2A L4 blowed

TNX Adrian I removed both IRFR110 (Drivers) Following checked: The Bias Voltage is 5.22 V Then with R6 / R9 / R18 / ( R15 is broken) - I can regulate the Voltage very smooth. Then checked all resistors around - and found: R23 / R24 are also blown (same in Driver stage are ok 1.1Ohm) Next will put in...
by HB9FIH
14 Oct 2016 17:22
 
Forum: Juma Discussion
Topic: TRX2A L4 blowed
Replies: 11
Views: 4477

Re: TRX2A L4 blowed - continue 10/2016

OK Adrian, now a long time ago I received the replacement parts and now I am back here in Turkey where the JUMA waits wor repair. I have replaced the T3 L4 TR2 Then by adjusting the trimmers to bias 0, I recognized the trimmer 10k R15 is also broken. Fortunally I had one, but a vertical standing no ...
by HB9FIH
12 Oct 2016 19:26
 
Forum: Juma Discussion
Topic: TRX2A L4 blowed
Replies: 11
Views: 4477

Need help for parts

Hi OM's from OH In my TRX2A some parts are broken. Now I recognized where I could get all the parts -> from partco.biz (Helsinki) But partco does deliver only within Finland. So need help for order send to an adress in OH and then send to my adress in Germany. the parts are Driver- and PA-Transistor...
by HB9FIH
04 Jul 2016 06:45
 
Forum: Juma Discussion
Topic: TRX2A L4 blowed
Replies: 11
Views: 4477

Re: TRX2A L4 / TR2 / T3 broken

Adrian a question: Do you, or some from Juma, visite HAM Radio in FNH next Weekend ? I this case could take the replacement parts for my broken TRX2 with. I am 3 days on the HAM. These are the parts ( really broken ones and others for replacement stock): TR2 (this is broken) TR1 TR4 TR5 T1 T2 T3 (th...
by HB9FIH
20 Jun 2016 07:30
 
Forum: Juma Discussion
Topic: TRX2A L4 blowed
Replies: 11
Views: 4477

Re: TRX2A L4 blowed

Tnx Adrian - so far all clear. I found more: see schematic, and I will remove the T3 now will order the parts (think all special parts for stock too) (have time, will be here mid September again) Only one Question: the IRF510 is like the IRFI510G - only its not isolated ? (there is a big price diffe...
by HB9FIH
26 May 2016 08:16
 
Forum: Juma Discussion
Topic: TRX2A L4 blowed
Replies: 11
Views: 4477

Re: try to upgrade

I use the Profilic adapter.
Seems this is not compatible with my WIN7 home pro
I'll try another one
by HB9FIH
25 May 2016 04:57
 
Forum: Juma Firmware by 5B4AIY
Topic: try to upgrade
Replies: 6
Views: 2886

Re: TRX2A L4 blowed

OK I did. From C11 against GND there where about 400kOhm. I feelt this is high... Further I recognized the fuse T2.5A is blown. Bridged (only for check) . I removed the PA board from TRX2 Then I connected a power source with current limit and increased slowly the Voltage. The curren was significant ...
by HB9FIH
24 May 2016 14:35
 
Forum: Juma Discussion
Topic: TRX2A L4 blowed
Replies: 11
Views: 4477

TRX2A L4 blowed

Hi Adrian Yesterday and today I participated the "King of Spain" in CW with TRX2A and PA100D. All wonderfull, also with the new FL2. Will be my best result in this contest. Just 1 hour ago, I made a QSO in Olivia with France. on 14 072 with 7 Watts on my SG239 Tuner up to ZS6BKW. The SWR w...
by HB9FIH
22 May 2016 19:29
 
Forum: Juma Discussion
Topic: TRX2A L4 blowed
Replies: 11
Views: 4477

Re: try to upgrade

TNX I installed them on a WIN7 Home Premium 32Bit and also on my Laptop Win 7 professioanl 64 Bit but It seems altough Windows says Drivers are ok I am not able to etablish a Connection. I try now on my Notebook Win 7 Starter 32 Bit Maybe the USB/RS232 interface is not, or no more compatible. This I...
by HB9FIH
18 May 2016 14:29
 
Forum: Juma Firmware by 5B4AIY
Topic: try to upgrade
Replies: 6
Views: 2886
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