Hi, Nate. I have a VHF PA sitting next to me and the sticker says:
CAUTION Tightening Torgues For Transistor Hardware Must Be Adhered To 6 +- in/lbs for 4-40 hdw 8 +- in/lbs for 8-32 hdw 12 +-in/lbs for 10-32 hdw I have not seen it in the LBI's either. Butch, KE7FEL/r From: Nate Duehr <[EMAIL PROTECTED]> Reply-To: [email protected] To: [email protected] CC: Scott Burkhardt <[EMAIL PROTECTED]> Subject: [Repeater-Builder] "old style" GE MASTR II VHF PA - transistor torque specifications Date: Mon, 16 Jul 2007 15:20:19 -0600 Hello all, I've been unable to find any engineering data on the older style GE MASTR II VHF PA's (the ones with the four small vertical final transistors, not the "modern" ones with three) that shows the proper transistor torque specifications for the transistor studs that pass through the heatsink, and attach to the PA heatsink with nuts from under the heatsink fins on the "back side". Anyone ever seen specs for these transistors anywhere? The later PA's are labeled with various torque specifications for the screw/tab style transistors on the newer PA's, and there's a label on this older one for various size nuts, but nothing I can find any LBI's about the transistors themselves. To be honest, I haven't been able to find an LBI for the older-style VHF PA anywhere I've looked, yet. A friend and I refurbished one of the older-style PA's this weekend, but we'd like to "do it right" and make sure we've torqued the PA transistors correctly (and evenly). Thanks in advance... Nate WY0X
