CUSTOMIZING YOUR PA1 INSTALLATION:
Since it's up to you to supply the enclosure, connectors and any desired operating conveniences, it's likely that each one of those thousands of PA1s in use today has its own personality. For some good ideas, take a look at "Turn Your HT into a 40W 2M Mobile Rig" by N8KDD in 73 Magazine, December 1989. The author's ideas are great, and we would only point out that his mention of the PA1 assembly instructions pertain to the simple sheets supplied prior to the publication of this manual. Also, we do find the relays supplied with the
The economy of the PA1, or even the
The hams at Ramsey Electronics thank you and hope you'll have as much fun using your amplifier as you had building it!
INSTALLATION NOTES:
•1. The best location for the relay is as close to the PA1 amplifier PC board as possible with a short solid connection from the relay contact to the amplifier input. If more than 1 inch, use coax.
•2. All coax shields must be grounded with the shortest possible lead length to your metal chassis ground point!
•3. One short, solid ground path to power amp PC board (or metal chassis or enclosure) is required.
•4. Expect the relay to pull about 100 ma.
•5. Miniature coax type
OPERATING NOTES:
❒1. If the relay chatters, it is a sign of high SWR, which you will wish to resolve anyway by antenna system or amplifier output adjustments.
❒2. If the relay action is "sloppy", there may be insufficient RF to drive the
5 watts from the PA1. The
❒3. As designed, the