A while back I bought a rig on eBay, but the seller had included this with a job lot of miscellaneous items.
In the box were three linear amplifiers. One was for 27 MHz which is of no interest to me and I will sell on. Another is one for 144 MHz. That is going to need a workaround as it was made for a specific transceiver way back, and I need to find a way to switch it as it has no RF sensing and I have no manual yet.
The third item was a Wood and Douglas amplifier for 432 MHz. It must date from the late seventies or early eighties. It is a solid piece of equipment. The seller said on eBay it was a maximum of 10 watts in for 30 watts out, but I have been reluctant to put it on dummy load to test it. I had no manual and there was nothing on the internet to help. It is a rare beastie.
Wood and Douglas was started by two radio amateurs in the late seventies to build and sell amplifiers, preamps and other amateur radio gear, but since has become a grown-up player. It has moved far beyond its original business.
On the off chance I sent an email via the website to ask if they had a manual or some instructions for this ancient amplifier. They emailed me back the next day with the instructions / spec which would have been sent out over thirty years ago when the amp was new.
This is absolutely brilliant customer service provided to someone who was not even a customer, but just someone asking a favour.
It is great credit to the company that they helped me out, so three cheers for Wood and Douglas. Thank you very much.
One more thing. The amp is a maximum 3 watts in for 30 out according to the manual, so it is just as well I did not try to overload it having relied on the seller. I am sure he had forgotten after not using it for many years. With any luck I have a usable amp for 70 cms.