[hpsdr] 50 Volt 300 watt PA from Russia with IMD3 >= 40 dB

[Sid Boyce]

Hi Tim,
Excellent, you are set up for either HPSDR or eb104.ru cabling.

ALEX switches the HPF's and LPF's to provide RX BPF's.
eb104.ru switches both the BPF's and LPF's  but bypasses the LPF's in RX.

In cuSDR if you go out-of-band you get no signals as no filters are 
switched in, i.e no Gen Cov.
I haven't checked but this may be normal behaviour for ALEX.

In cuSDR select "Alex Auto" and in HPSDR --> Ext Ctrl set up the filter 
selection as in PowerSDR. The RX and TX filter settings only differ in 
that TX filters all have bit 5 turned on.

There is also a complete absence of ADC OVERLOAD with 0dB attenuation.

One thing not to miss for the BPF board -- isolate pin 12 of the db25 
on-board connector from GND and wire it to the +12V input socket on the 
board. I used a Stanley knife to separate it from the GND land pattern 
that surrounds it.
This is required for Hermes, the BPF board as is was not designed solely 
as a shoe-in for Hermes though it fits perfectly in the ANAN-10 case 
above Hermes.

The INTERCONNECT DIAGRAM explains it all.
73 ... Sid.

On 05/11/13 01:12, Tim ORourke wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
> I am wait delivery of LPF, amp and BPF assemblies.
>
> I have a Penelope compatible db25 in Hermes enclosure, this has all 
> the signals necessary for the new gear.
>
> I plan on putting BPF in matching Hammond enclosure, and mounting amp 
> and LPF's in custom enclosure.
>
> While I was in there I installed a Alex connector on opposite end of 
> Hermes enclosure, now Hermes is connector compatible with all the 
> HPSDR add on gear including Hercules 100W amp.
>
> Tim
>
>     -----Original Message-----
>     From: Franz Hegener
>     Sent: Nov 4, 2013 5:08 PM
>     To: "hpsdr at lists.openhpsdr.org"
>     Subject: [hpsdr] 50 Volt 300 watt PA from Russia with IMD3 >= 40 dB
>
>     Hello all,
>     here you can find the very good PA from Victor.
>     The IMD3 values are really good with the 50 Volt
>     PA. One class A driver with a MRF150 and a push
>     pulls with two SD 2933 you get 300 watt with >40 db.
>     A good choice to build your own SDR with this PA.
>     The needed BPF and LPF with the PA can be ordered there.
>     I have ordered all the above things ...
>
>     http://eb104.unoforum.ru/
>     http://eb104.ru <http://eb104.ru/>
>
>     73
>     Franz
>
>
>     From my mobile device
>
> Tim O'Rourke
> W4YN at ARRL.Net
> Low Power Amateur Radio Rocks
> Member of Flying Pigs,ARCI,GQRP,RSGB,ARRL Life Member
> NHRA Life Member
>
>
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-- 
Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot
Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support
Senior Staff Specialist, Cricket Coach
Microsoft Windows Free Zone - Linux used for all Computing Tasks

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