Manager


Manager - NA6M
Manager Notes

Classified: EFJohnson 6N2 Thunderbolt Sold

Date Posted By Category User IP Address
2020-12-13Login requiredVHF/UHF AmplifiersLogin required
SOLD!EF Johnson 6N2 Thunderbolt, working. Fewer than 300 made. Runs a pair of 4CX250B tubes for ~600W output in CW and 500W SSB. Modified by me: added internal coaxial T/R relays; replaced the VR-tube based screen supply entirely with Zener/MOSFET regulation (similar to GM3SEK circuit). Note: this is not really an “appliance-operator” amp. Includes original/annotated documentation.
Note: the photo makes it appear as if the outer covers are missing. They are not...this amp is 100% complete.
$500.
Pick up or meet within reasonable distance of Whitehouse Station NJ.