ARLA/CLUSTER: Será os projectos QRP de auto-construção de 2017, são parecidos quando não iguais, com os de 1975

[João Costa > CT1FBF]

Radio Amateuring like it’s 1975

*Jenny G7CKF* has written a thought provoking article on Hackaday that
notes many of today's construction projects could just as well have been
published in the 1970's

She writes:
It was a tweet from an online friend in the world of amateur radio,
featuring a transmitter design published in Sprat, the journal of the G-QRP
club for British enthusiasts of low-power radio.

The transmitter was very simple, but seriously flawed: keying the power
supply line would cause it to exhibit key clicks and frequency instability.
It would probably have been far better leaving the oscillator connected
full-time and keying the supply to the amplifier, with of course a suitable
key click filter.

We’ve all probably made projects that get the job done at the expense of a
bit of performance and economy, and from one angle this circuit is a
fantastic example of that art. But it’s not the shortcomings of direct PSU
keying a small transmitter that has brought it here, but observation
instead of what it represents.

Perhaps my social group of radio amateurs differs from the masses, but
among them the universal lament is that there is nothing new in a simple
transistor transmitter that could just as well have been published in 1977
as 2017.

Read the full article at
https://hackaday.com/2017/12/07/radio-amateuring-like-its-1975/
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