IMPORTANT NOTE: I have written permission to use all of Annecke's original publications and pictures on my web site. This permission was granted by Fred Annecke, Alfred Annecke's son.
[ Type 228 ]
Type 228 was Annecke's entry-level transmatch. Like its big brother, the 750w Universal-Transmatch, it is based on the original "Ultimate Transmatch" from Lew McCoy, W1ICP (SK).
Note the word "original". Originally, the variable capacitor on the TX side was a dual-capacitor (voltage divider). Later versions of the W1ICP's Ultimate Transmatch as well as Annecke's Universal Transmatch did not include this luxury. It has been argued by some that the split capacitor on the input side was not necessary.
- Bands: 80 - 10m
- Power Rating: 300 Watts PEP
- Impedance Matching Range:
- 50 to 200 Ohms Coaxial
- 50 to 2000 Ohms Longwire Antennas
- Size (Width/Heigth/Depth): 20 x 8 x 25cm (8" x 3" x 10")
The Matching Range specifications are unclear to me. I see no reason why a higher impedance on the coax could not be matched, other than you really would not want to have more than 4:1 SWR on a coax-fed antenna. If you do, then maybe you should fix your antenna!
I never owned this smaller version, but I did own the 750 version and it easily handled its power rating.
I do not have a manual but the excerpt out of Annecke's 1994 catalog (Liste 94) below includes a schematic, parts list, and short description of this lovely little tuner.
IMPORTANT NOTE: I have written permission to use all of Annecke's original publications and pictures on my web site. The permission was granted by Fred Annecke, Alfred Annecke's son.