DF1UD EN
SB-220
Oldtimer
HEATHKIT SB-220
The stove in the shack
Home-built year 1975
An RF power amplifier as a kit for DIY. The kits from Heathkit were or are the legends of radio amateurs. With great detail described and illustrated construction manuals that kind of self construction also made for the not so very experienced radio amateur inventors and the development of the device very, very fun. And it fitted and worked mostly everything.
SB-220 Specificationen
Band Coverage |
80, 40, 20, 15 und 10 amateur band |
Driving Power required |
100 Watt |
Maximum Power Input |
SSB: 2000 watts PEP
|
Duty Cycle |
SSB: ontinuous voice modulationCW: continuous (max key down 10 minutes) |
Third Order Distortion |
-30 dB or better |
Input Impedance |
52 Ohm unbalanced |
Output Impedance |
50 Ohm unbalanced; SWR 2:1 oder less |
Front Panel |
Tune |
Rear Panel |
Line cord |
Tubes |
Two 3-500Z |
Power Requirement |
120 VAC, 50/60 Hz, at max 20 A
|
Cabinet Size |
14-7/8” wide, 8-1/4” high, 14-1/2” deep |
Net Weight |
50 lbs |
Maintenance and Upgrade
In 1996, I overtook the stage and thereby learned some sections of the device, a hardware upgrade, with kits of the following company:
HARBACH ELECTRONICS, Melbourne, Florida, USA
Specifically, were the following Repair Kits:
- FB-100Filter Block
- FM-101Fan Replacement
- BF-100Bumper Feet Replacement
- PS-100Parasitic Suppressor Kit
- RM-100Rectifier Metering Board Replacement
- SS-100Soft Start Kit
- SK-220Soft Key Kit
As can be seen today from the Internet is, were the meantime, the names of the kits of the adapted '220 'and now call themselves PS-220, SS-220, etc.
Does not impair the installation, however, as the specifications remain the same!
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