¿ªÔÆÌåÓý

  1. BITX20
  2. Messages
Single Messages Topics Expanded Polls

Re: ubitx version 2 - substitute darlington for Q70 (MMBT3904) to increase stage gain?

 

Hi,

Is it possible that when the uBitx is receiving through the transverter the noise level will be greatly increased.?

At VHF and higher most of the noise comes from the RF preamp stage (rather than from the atmosphere picked up by the antenna) and may already be at a significant level when feeding into the uBitx. Assuming that your transverter has RF and other IF stages, rather than being a "passive" mixer. ? ?

But, the proof in in the pudding. As I'm only speaking to the general case.?

Tom, wb6b
Join [email protected] to automatically receive all group messages.