[hpsdr] Hermes check out

Fri Apr 6 12:13:32 PDT 2012

Hi Jeremy.

I must have been a bit sleepy this morning, the 2 tabs are just for  
keeping the frame steady!

But if you are going to use Hermes together with Apollo in this Hammond  
box, there is no need for the SMA connectors extruding out of the panel  
unless you want access to the signals anyway. (SMA for 10 MHZ you may need)

I have checked the installation and if the Hermes board is installed  
exactly flush with the box, the ends of the connectors are less than 0,5  
mm from the panel and that should be enough for all contacts to be closed  
when the jack is inserted. I have to test this.

We may ask Abhi to move the connectors all the way out to the edge of the  
board for the production run. This will give 1.2 mm extra.

73, Kjell

På Fri, 06 Apr 2012 10:20:37 +0200, skrev Kjell Karlsen <la2ni at online.no>:

> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Jeremy.
>
> Please do not shorten the box, there are two small tabs on each plastic  
> bezels that can be cut off. This give you 2,7 mm extra length. If you  
> place spacers on the SMA connectors I think everything will fit.
>
> In the production version the power connector must be of the 90 deg.  
> type. As the ON/OFF switch is not needed, it can point in that direction.
>
> Remember there is place for installing a connector for an external  
> speaker (J27). Please use the one with insulated treads or make the hole  
> a bit larger to prevent it from touching the panel. The Audio amplifier  
> is of the bridged type so the leads should not be grounded when  
> inserting the jack.
>
> I am working on the installation of Apollo and Hermes into the box. The  
> SMA connectors are not used, TX out and RX in are internally connected.  
> I solder the coax directly to the bottom of Hermes and use SMB  
> connectors on Apollo. Also the ribbon cable between Hermes and Apollo is  
> soldered to the bottom of Hermes using a crimp connector (PN7800-000T  
> made by 3M or Harting PN 09 18 110 9422).
>
> I´ll post pictures of the complete assembled unit when it is finished.  
> At the moment I do not have the right software for controlling Apollo  
> but I hope to get it during the next week.
>
> 73, Kjell
>
>
>
> På Fri, 06 Apr 2012 00:42:16 +0200, skrev Jeremy McDermond  
> <mcdermj at xenotropic.com>:
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> I have some notes after getting to the mechanical parts of Hermes after  
>> the MicroHams conference in Seattle.
>>
>> I ordered a Hammond extruded enclosure from Digikey because I didn't  
>> want things getting damaged around my shack.  Sometimes things are  
>> rather perilous.  I ordered Hammond part number 1455Q1601, DigiKey part  
>> number HM1171-ND.  You can see some pictures of the finished product  
>> here:
>>
>> https://picasaweb.google.com/lh/photo/ELzhMfS3ECZ6Ca29UGOStNMTjNZETYmyPJy0liipFm0?feat=directlink
>> https://picasaweb.google.com/lh/photo/-IiBDmjqqU6KqfF3D0_vi9MTjNZETYmyPJy0liipFm0?feat=directlink
>> https://picasaweb.google.com/lh/photo/diXrYXBPFcRo3TOybHEr3tMTjNZETYmyPJy0liipFm0?feat=directlink
>> https://picasaweb.google.com/lh/photo/U-iAzyHImnQqDYUOQDX22NMTjNZETYmyPJy0liipFm0?feat=directlink
>>
>> You'll have to forgive the Ethernet hole a little.  It turned out a  
>> little more rat chewed than I had intended with the Dremel tool.
>>
>> There are a couple of notes in this process.  First, I put the Hermes  
>> board in the fourth slot down in the enclosure attempting to leave  
>> plenty of room for Apollo in the future.  This turned out to be a  
>> mistake because the Molex KK series connector that provides power to  
>> Hermes is tall enough that it will not fit in the vertical space  
>> between the board and the top.  I had to do a little bit of custom  
>> engineering to cut some small slots in the Molex body to make it fit.   
>> I chose to use a coaxial power connector instead of Andersen Power  
>> Poles like I usually use because of space considerations inside the  
>> box.  There really wasn't a great Anderson mounting method that would  
>> have made those connectors work.  It's not a huge deal because my K2  
>> and future KX3 both use the same size of connector I put in Hermes.
>>
>> The other big issue with this setup is that Hermes is slightly too  
>> short for a good fit in the case.  If one snugs up the SMAs on the RF  
>> side of things, the Mic/Phone/Key connectors are far enough back from  
>> the mounting plate that the headphone hack doesn't go in quite all the  
>> way.  The Ethernet works fine, though.  If you actually make the audio  
>> connectors so they barely peak through, there is hardly any threads  
>> left on the SMAs.  Some kind of custom end plate might remedy this  
>> situation, though.
>>
>> Otherwise, electronically, Hermes powered right up on the first try.   
>> While I did read Phil's "Startup Manual," I didn't follow it because I  
>> assumed my A&T board was properly tested by Scotty's fine crew and that  
>> it had firmware in it.  Additionally, the second part of the document  
>> was specific to PowerSDR, which I don't use.  Nonetheless, Hermes  
>> powered right up and came up on my network.  Heterodyne talked to it  
>> the first time around and worked perfectly that I can tell so far.  I  
>> haven't had much of a chance to look at spurs or other performance as I  
>> just got the mechanical issues dealt with.
>>
>> One other thing of note to Macheads.  It appears as though MacOS X  
>> keeps its Link Local IPv4 address (APIPA) even if the interface has a  
>> real address.  This means that even if you plug Hermes into a net  
>> without a DHCP server, Heterodyne still finds it and talks to it, so  
>> there's really zero configuration in simple configurations.
>>
>> --
>> Jeremy McDermond (NH6Z)
>> Xenotropic Systems
>> mcdermj at xenotropic.com
>>
>>
>>
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>
>

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