HEATHKIT SB-220 HAM/ AMATEUR RADIO HF AMPLIFIER- TESTED WELL For Sale

HEATHKIT SB-220 HAM/AMATEUR RADIO HF AMPLIFIER- TESTED WELL

* - Tested on bands noted below.

* - Search the internet with the followinginformation to download a free manual for detailed features and a full set ofspecifications:

* - 80,40,20,15 & 10 Meters

* - The tubes have been pulled for shipment. They will need to be reinstalled.

* - Presently wired for 120v.

This is a very clean amplifier. When I had the cover off of this amplifier Itook photos and examined various components.I checked the band switch and found no evidence of arcing. In addition, all components viewed appearednormal with no evidence of overheating.

I tested the power output and here arethe test results:

ma

ma

Watts

Watts

MHz

Plate

Grid

High

Input

Output

Frequency

Plate

Load

Current

Current

Voltage

Power

Power

3.750

50%/80

3.25

500

145

1,950

975

700

7.150

75%40

3.10

500

130

1,950

975

680

14.175

15

4.20

500

150

1,950

975

740

21.225

15

4.80

500

150

1,950

975

680

28.500

15

5.20

500

140

1,950

975

600

Comments:

1.I ran the tests with a fan cooled dry 50 ohm dummy load to measure the outputpower levels with a Bird Wattmeter and a 1000 watt slug. As a result, depending upon the impedance of agiven buyer\'s antenna, the load and plate tuning positions will vary. The photograph of the amplifier with the BirdWattmeter was taken when I ran the 40 meter test.

2.The manual indicates in the CW/Tune mode the final plate current shouldbe around 500ma, grid current between 100 & 200 ma, and a high voltage of2000v for the specified input power of 1000 watts so I only pushed the amp upto 500 ma.

3. Consideringthe age of this unit I was pleased with the tests especially the output on 10meters. Since this amplifier was notdesigned for the WARC bands I did not load the amp on them.

In an attempt to minimize damage this equipment is tripleboxed and insured for the purchase price.Domestic shipping is USPS economy for the price of $88 paid by buyer. International shipping is available via the Global Shipping System only and paid by buyer. Please check to make sure your countryqualifies under the Global Shipping System prior to offerding. Attempting to ship this large and heavy packageany other method Internationally is very expensive typically $450+.

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