Here is a true Hamtronics Helical Resonator preamp for 220 MHZ and 440 MHZ http://www.hamtronics.com/pdf/Manuals/HRA.pdf.
73 W4CSO ----- Original Message ----- From: Barry To: repeater-builder@yahoogroups.com Sent: Thursday, February 05, 2009 11:52 PM Subject: RE: [Repeater-Builder] Re: Hamtronics Helical Resonator Preamp or Advanced Research Preamp What he is saying is , a lower gain preamp aplifies less noise in relation to the signal so the audio sounds better ------------------------------------------------------------------------------ To: Repeater-Builder@yahoogroups.com From: lar...@hotmail.com Date: Fri, 6 Feb 2009 04:47:11 +0000 Subject: [Repeater-Builder] Re: Hamtronics Helical Resonator Preamp or Advanced Research Preamp --- In Repeater-Builder@yahoogroups.com, "Joe Burkleo" <joeburk...@...> wrote: If for example the site has > a higher than normal noise floor a lower gain preamp will often times > amplify more of the signal and less of the extra site noise, where a > higher gain preamp may amplify both the noise and signal, giving you a > signal with more noise than you would like. Joe, scratchin' my head here... Would you be able to clarify the above statement for me? Laryn K8TVZ ------------------------------------------------------------------------------ Get what you want at ebay. Get rid of those unwanted christmas presents!
