[Milsurplus] Hey Bob, W9RAN

[Robert Nickels]

On 1/11/2026 10:01 PM, B. Smith via Milsurplus wrote:
> It was featured in "How to Become a Radio Amateur". Year 1954.

Wow Breck!  That looks like a photo right out of QST!

Of course back then we all used old FT-243 crystals that could take it.  
In fact some transmitters used regenerative crystal oscillators and such 
that intentionally generated a lot of power so an output tuned circuit 
could select the desired harmonic to get mulit-band coverage without 
multiplier stages.

I've found that the small modern crystals like Steve sells work fine in 
any MOPA type rig, and in things like QRP-level Jones push-pull circuits 
as well.     Then there's the old-school technique of putting a small 
incandescent lamp in series with the crystal.   The idea was that the 
positive temperature coefficient of the lamp would limit the current to 
a safe level to protect the crystal.

73, Bob W9RAN
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