[hpsdr] Amp alternative for Hermes, HPSDR

[Sid Boyce]

Excellent Tim,
I have both Hermes and the eb104.ru BPF board in the ANAN-10 enclosure.
I replaced the backplate of the enclosure with 2 aluminium strips bolted 
to the 2 sides to hold the boards firmly in place.

The full case is a 2-piece affair, the bottom and front holds the 
ANAN-10 enclosure and the ANAN-10 front panel is bolted to the front.

The top and back half of the full case -   top with the 300W PA/LPF and 
the large heatsink and back with fan, power supply inputs and antenna 
connector.

Pictures in the Photos section and on my QRZ.com page.
73 ... Sid.

On 07/01/14 13:15, Tim-ORourke wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
> I like to build amps and have done several now for our SDR rigs, 
> Hermes and HPSDR.
> They include Hercules(2), Munin, and now Eb104 design from Victor and 
> his crew at Eb104.Ru.
> Hercules and Munin are well know to group but you may not have seen 
> much about the amps from Victor, UA3QLC.
> They offer amp kits or assembled pallets from 10-900W and LPF to go 
> along with these amps. Additionally they offer a BPF board the same 
> size as Hermes.
> I chose the 500mW to 300W pre-assembled board with LPF's and the BPF 
> board.
> The way I set it up with Hermes is to control BPF board (mounted in 
> matching Hammond enclosure) from J16 on Hermes let BPF board control 
> LBP's and amp.
> From HPSDR I could control direct from db25 on Penny and use rx 
> filters in Alex and LPF in amp, however since I had cables already 
> made up I used their BPF's for HPSDR also.
> Note more on cabling later.
> The filter controls are set with external control output's for RX and 
> TX per Victors requirements.
> Using the BPF board it takes care of selecting correct outputs for 
> LPF's on amp and provides attenuation on RX when TXing.
> One could use Alex and use db25 direct to amp using different settings 
> for RX and TX, have not tried this but it should work FB.
> Bottom line is I have Hermes or HPSDR driving 300W amp with 300mW and 
> have received great reports form the few qso's so far.
> I need to drag service monitor into shack (major clean up needed 
> first) to check the harmonic content however the results from others 
> on their forum look favorable.
> One requirement for their amps is 50V supply, this helps with 
> harmonics, I picked up a nearly new 50V- 50A telcom supply off slee 
> bay for a very reasonable price.
> The amp only requires 15- 20A when used at 300W.
> Later this week I will post more pictures on my Flickr Page, 
> http://www.flickr.com/photos/71285665@N03/sets/72157638448913846/
> Cabling:
> My goal was to use IDC cables to keep cabling as simple as possible.
> This led to mounting the BPF's in matching enclosure, this allowed a 
> short IDC cable from Hermes to BPF enclosure where I broke out signals 
> needed to BPF and captured signals needed for amp. From BPF to amp is 
> another IDC cable. Later this week you will see this on Flickr.
> 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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