[Elecraft] question on part

[John R. Lonigro]

John:
The OD of the barrel is 5.5mm and the ID is 2.1mm.  There are several dc 
power connectors on the market with 5.5 mm OD barrels, but some have a 
2.1 mm ID, others are 2.5 mm ID.

Hope this answers your question.

73's,
John AA0VE

n3drk wrote:

> The male connector for the dc supply on the back of the K2 mates with 
> the dc power jack. In the manual it states this is a 2.1mm male 
> connector. What are the inside and outer dimensions?
> john