Prologue: Time has flown... About 12 Years ago I acquired a used HW-9 (w/ WARC). Over the years- all of the components needed to make up the complete station were collected. Many of the recommended modifications were made to the little radio. A couple of times- the mods killed it dead. But recovering from the errors and making it work again provided joy as well a learning experience. All mods made a noticeable difference- some made a huge difference in performance.
I have always been fond of the Brown Heathkit line of amateur products. I had big visions of having a complete Brown high power station with a HW-5400, SB-1000 linear amp and a SA-2060A tuner... but a lot of other things came along that were just as interesting to do. As of late- I am reducing items in my ham radio collections (or is a hoard?). Since I haven't used this HW-9 in about 4 years- It's now for sale... and I am hoping that whoever buys it will use it and enjoy it as much as I once did.
Visible Mods to the rear: RCA Key Jack is changed to 1/4" Mono [the old RCA Jack is included in a "parts package"]. The Headphone jack is now Stereo for now-a-days headphones. A mono plug will also work.
Included is a spare Power Cable with Anderson Power Poles.
This PSA-9 has been modified per Gary Surrency's popular article. The voltage regulator was changed to a LM317 for superior regulation.
The SP-99 was originally built for the HW-99 (non QRP transceiver) which had a couple of watts of audio output. The HW-9's audio output was meant to drive headphones. A LM380 Audio Amp (for normal loudness) and a AA battery tray (for picnic table ops) are added to this SP-99. The original speaker was replaced with a commercial radio service NEC communications speaker. There's a Red LED to remind the operator that the power is ON. All additions and modifications did not alter the originality of the speaker. Mods are easily reversible and all parts are provided to restore to original.
Amplifier and batteries mount on plywood base which is attached to the SP-99 with industrial Velcro which as easily removable. Wall-wart power supply plugs into the coaxial jack- which disconnects the batteries.
In this dropbox folder are more photos of this HW-9 w/ WARC station- as well as a couple of movies of On The Air action.
Best regards, Rich KR7W