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Please share your recording of the 70th Anniversary BBC Midwinter Broadcast
to Antarctica here!
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In the comments section of this post, I’d like you to share your recording
of the 2025 BBC Midwinter Broadcast to Antarctica! Time and frequencies Our
intr...
6 hours ago
Bill!
ReplyDeleteYikes you have a hammer out next to the heat sink!!
Great Video Bill!
ReplyDeleteHi Bill,
ReplyDeleteYou chose a difficult size for your first use of a tap. As you found out, 4-40 taps are very fragile! A couple of tips to add to the Tribal Knowledge:
1. If you use a hand drill, it pays to drill the hole first with an undersize bit, and then enlarge it with the correct size bit. This is not necessary if you have a drill press.
2. A better lubricant for tapping aluminum is kerosene, or if that's not available you can use WD-40. The oil is better for tapping steel.
3. You found the correct method for turning the tap holder - the T handle is only necessary if you are using taps larger than about 1/4 inch.
The amplifier looks pretty nice - hope it works out OK.
73,
Shlomo, 4X4LF