<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><blockquote type="cite"><span class="Apple-style-span" style="font-family: -webkit-monospace; font-size: 10px; "></span></blockquote><div>Hi Jeff</div><div><br></div><div>thats exactly what I did: I modified my HW-104 in order to use Driver and PA with Penelope. I used antenna switch 5 to switch from internal to external exciter and used J12 (receiver antenna) to connect Penelope. So the output of Penelope is connected via a manual attenuator through J12 and switch 5 to the Driver Circuit Board J 2/3 (RF in). As I do not use the ALC control I had to carefully adjust the output power of Penelope. The PTT switch of the HW-104 has been wired at the microphone connector. To switch the antennas I used the open drain FET on J6 pin 13 to control a T/R relay as already has been proposed. As my Mercury has not yet arrived I used the Flex-5000 as receiver. I made some qso's and the signal was reported to be nice.</div><div>As this configuration worked I tried another one: I connected the Penelope signal to J1 of the BPF board of the SDR-1000. This is quite simple as you only have to disconnect the little rf cable between RFE and BPF board and install a BNC jack to the "Rx 144 MHz" hole of the back plane. This worked also well and I will probably use this configuration with when I get Mercury.</div><div><br></div><div>73, Chris HB9AJP</div><div><br></div><br><blockquote type="cite"><span class="Apple-style-span" style="font-family: -webkit-monospace; font-size: 10px; ">Date: Sat, 03 Jan 2009 22:53:11 -0500<br>From: "jkelly" <<a href="mailto:jkelly@bellatlantic.net">jkelly@bellatlantic.net</a>><br>Subject: [hpsdr] SB104A Power Amp<br>To: <<a href="mailto:hpsdr@lists.hpsdr.org">hpsdr@lists.hpsdr.org</a>><br>Message-ID: <7B1DA3B8A2424708A410DAEAC7435DDE@JeffPC><br>Content-Type: text/plain; format=flowed; charset=iso-8859-1;<br><span class="Apple-tab-span" style="white-space: pre; "> </span>reply-type=response<br><br>I am intriqued by the idea of using an amp module from an older rig<br>in storage in the shack for a HPSDR power amp.<br><br>I have a working SB-104a laying around and taking a quick look at the boards<br>it looks like it might work out.<br><br>Here is a top view photo:<br><a href="http://mysite.verizon.net/jkelly/ham/SB104-3.jpg">http://mysite.verizon.net/jkelly/ham/SB104-3.jpg</a><br><br>This is a little out of my league but would appreciate any comments on<br>whether this could work with Penny and any ideas to get started.<br><br>thanks,<br><br>Jeff<br>KT2K</span></blockquote></body></html>