Cushmans used low value fuses for years. Eric Lowell Eastern Maine Electronics Inc. 48 Loon Road Wesley ME 04686 [email protected] www.satnetmaine.com 207-210-7469
________________________________ From: James <[email protected]> To: [email protected] Sent: Tue, January 5, 2010 5:30:00 PM Subject: [Repeater-Builder] Service Monitor Input Protection Hello to the group. Knowing most of you have service monitors for the Repeater Builder Hobby, I wanted to pose the following question. What method do you use to protect the input of your service monitor from excessive RF Power input? I am referring to the input/output jack that is limited to 2.5 watts on MANY service monitors. I know I can use an attenuator, but that gets removed for sensitivity checks and may not get put back on. One suggestion is a RF Relay that would trip on say one watt and put the power to a dummy load. The problem is I have used one of the cheap circuits in the past and toasted transistors in a Pre-amp, before the relay reacted as the book said it should. However I know there are circuits in say the Mirage Amp that also has a Pre-Amp that is removed from the antenna during transmit, that works well. What are you doing to protect your monitor? Appreciate your thoughts. 73 JIM KA2AJH
