|To:||LineOne <[email protected]>|
|Subject:||Re: LF: Receiver protection|
|From:||Andy Talbot <[email protected]>|
|Date:||Tue, 10 Jul 2018 20:19:51 +0100|
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|References:||<[email protected]> <[email protected]> <[email protected]> <[email protected]> <[email protected]>|
That preamp looks as if it would laugh at +5dB input and just amplify it linearly - giving your Softrocka run for itsmoney.
A can see that preamp easily surviving well over +20dBm input leakage. Its dissipating something like 1 Watt in its own right, so you can quite reasoably to expect it to be happy with even that sort of input.
So you could even contemplate pairs of series diodes to limit at a HIGHER voltage and that way less of a compromise on strong signal handling that input diodes always give you.
Mind you , on my 400W 475kHz Class-E amp, I do use a pair of relays, terminating Rx in 50 ohms and measure 70dB attenuation. But I do run Rx into an SDR-IQ which is a bit more expensive to replace. But even that can survive over +20dBm. I know, I've done it!
On 10 July 2018 at 20:03, N1BUG <[email protected]> wrote:
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