Re: UBITX TX level diagramme
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That¡¯s why I mentioned it.? And yes, most radios do have bandpass filters at intermediate stages for the very reason we are seeing a problem in the uBITx. ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of ajparent1/KB1GMX
Sent: Sunday, September 2, 2018 4:46 PM
To: [email protected]
Subject: Re: [BITX20] UBITX TX level diagramme ? MRM,
An example of a DBM radio and oldie is the Atlas180 and friends (210, 215 210x...).
a really simple radio once you cut to the bone.
They use band pass filters for RX and TX pre-power amp and low pass post amp
to take out harmonics.? It was the standard of the day and still is.??
So is the case for bitx20V1, Bitx17, bitx40 and other variations and flavors.
Filter using band pass you get clean, low pass is not adequate filtering save
for harmonics.
Allison -- ¡_. _._
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MadRadioModder