[hpsdr] Amp alternative for Hermes, HPSDR (plain text this time) (x fingers)

[Berndt Josef Wulf]

G'day Tim,

Greate report! Can you check the link you provided, it doesn't work?

73, Berndt
VK5ABN

On Tue, 2014-01-07 at 13:41 -0500, Tim ORourke wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> I like to build amps and have done several now for our OPENHPSDR rigs, Hermes and HPSDR.
> They include Hercules(3), Munin (2), 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 !
 300
>  mW 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 W4YN
> 
> 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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