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Re: PA1000 and SunSDR2 Pro from Expert Electronics

Hello Slav, Sure, also JUMA PA100-D is compatible with SunSDR2. All you need is to provide PTT signal (TX ON) signal and use frequency detect in PA100-D. The PTT out in SunSDR2 is pin 13 (and GND pin 15) in the EXT CTRL connector. See those two wires shown in PA1000 manual but connect them to 3.5mm ...
by OH7SV
02 Jan 2019 17:52
 
Forum: Juma Discussion
Topic: PA1000 and SunSDR2 Pro from Expert Electronics
Replies: 4
Views: 757

Re: PA1000 and SunSDR2 Pro from Expert Electronics

Hello Tom,

There are currently PA1000 owners who are using SunSDR2 Pro with JUMA PA1000.
See the cable and configuration instructions in the latest JUMA PA1000 user manual v1.45 found here www.jumaradio.com/juma-pa1000

73 Matti OH7SV
by OH7SV
02 Jan 2019 16:35
 
Forum: Juma Discussion
Topic: PA1000 and SunSDR2 Pro from Expert Electronics
Replies: 4
Views: 757

Re: JUMA COM HUB and MacBook, KX2, PA1000

Ryan, We have not tested JUMA COM HUB with a MacBook. But it should work fine if you are able to connect MacBook directly to your KX3. All the the settings are the same as if connecting directly to the KX3 alone. You only need to set COM HUB for the same baud rate as MacBook/KX3. Read more here http...
by OH7SV
17 Apr 2018 17:54
 
Forum: Juma Discussion
Topic: JUMA COM HUB and MacBook, KX2, PA1000
Replies: 1
Views: 981

Re: JUMA PA1000 with KAT-500

Hello all, Do not route JUMA PA1000 PTT signal via any tuner because it can cause hot switching in PA1000. The routing will spoil the PTT/RF timing coming from your transceiver. Typically the PTT signal (TX ON, SEND etc) comes abt 10ms before a transceiver is putting RF out and vice versa when you r...
by OH7SV
30 Jan 2018 16:52
 
Forum: Juma Discussion
Topic: JUMA PA1000 with KAT-500
Replies: 2
Views: 1610

Re: Improving cooling of JUMA PA100-D

Roland,

Oh... that explains why you got so high temperature readings.
You can consider to install the original fan into the correct orientation.

73 Matti OH7SV
by OH7SV
05 Jan 2018 11:10
 
Forum: Juma Discussion
Topic: Improving cooling of JUMA PA100-D
Replies: 10
Views: 2297

Re: Improving cooling of JUMA PA100-D

Ok Roland,

Please check that the fan is blowing towards the heatsink! (Not sucking)
How was the original fan installed?

73 Matti OH7SV
by OH7SV
05 Jan 2018 10:34
 
Forum: Juma Discussion
Topic: Improving cooling of JUMA PA100-D
Replies: 10
Views: 2297

Re: PCB Gerber files for the retired Juma kits

Here are few decent PCB suppliers and you can easily find more by Googling.

www.pcbway.com
www.pcbgogo.com
www.pcbcart.com

73 Matti OH7SV
by OH7SV
04 Jan 2018 19:08
 
Forum: Juma Discussion
Topic: PCB Gerber files for the retired Juma kits
Replies: 2
Views: 1292

PCB Gerber files for the retired Juma kits

Hello all, We have published the PCB Gerber files for the following retired Juma kits - RX1 Receiver - TX1 Transmitter - TRX1 Transceiver - TRX2-VM Voice Memory option - JUMA KB1 External Keyboard option Feel free to use these Gerber files for club projects or for your personal use. You can find the...
by OH7SV
04 Jan 2018 17:26
 
Forum: Juma Discussion
Topic: PCB Gerber files for the retired Juma kits
Replies: 2
Views: 1292

Re: Improving cooling of JUMA PA100-D

Roland, You are right that digi modes load more and especially if the 'keydown' transmit period is long the temperature will increase. Good news is that we have not heard any PA transistor failures in JUMA PA100-D. There is one very easy improvement for additional cooling. See the section 3. in the ...
by OH7SV
01 Jan 2018 15:50
 
Forum: Juma Discussion
Topic: Improving cooling of JUMA PA100-D
Replies: 10
Views: 2297

Re: TX 500 Filter orientation

Mike and others,

T1, T2, T3 and T4 are symmetrical RF transformers so you can install them in the two orientation.

The SWR bridge transformers T5 and T6 are not symmetrical but the PCB routing is designed so that you can install them also in the two orientation.

73 Matti OH7SV
by OH7SV
21 Dec 2017 19:47
 
Forum: Juma Discussion
Topic: TX 500 Filter orientation
Replies: 2
Views: 855
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