Scott, >From an amateur approach this is how I would describe it. I am just now learning about Mastr IIs. The PA appears to be in 3 stages and can be separated physically into 3 different boards. The first board has 2 transistors (4340P1 & 4340P2). The first board appears to drive the second board which has one power transistor (4304P4). At the end of the second board I can get 50 watts output power so I figured everything was good to there. The 3rd board has two power transistors that appear to be in parallel. From there it goes into what appears to be a matching network and then on out to coax. The number on the board is PL19D424266G1 Rev B. From what I understand about any 110 watt board will interchange even is the configuration is different. Contact me personally at this email if you wish and many thanks. [EMAIL PROTECTED] Randy W4CPT
-----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Scott Zimmerman Sent: Monday, July 23, 2007 3:31 PM To: [email protected] Subject: Re: [Repeater-Builder] GE 100 watt PA final transistors Randy, Since you have been struggling with this for a while now, tell me what style VHF PA you currently have (the 3 or 4 transistor final) and I can sell you a complete VHF 110W PA known working for MUCH, MUCH cheaper than that. Then all you have to do is some transplanting. Scott Scott Zimmerman Amateur Radio Call N3XCC 612 Barnett Rd Boswell, PA 15531 ----- Original Message ----- From: "R. K. Brumback" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, July 23, 2007 2:38 PM Subject: [Repeater-Builder] GE 100 watt PA final transistors > > I just got a quote back from Digitron Electronics on the MRF-247 final > transistors for the VHF Mastr II. They want $80.00 EACH!! OUCH!!!!!!!! I > nearly crapped in the chair. They had about 5,000 of them and I would say > that is the reason they have so many. > Randy > KI4BQN > > > > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.5.476 / Virus Database: 269.10.14/912 - Release Date: 7/22/2007 > 7:02 PM > > > > > > > > Yahoo! Groups Links > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.476 / Virus Database: 269.10.14/912 - Release Date: 7/22/2007 > 7:02 PM > > Yahoo! Groups Links No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.10.14/912 - Release Date: 7/22/2007 7:02 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.476 / Virus Database: 269.10.14/912 - Release Date: 7/22/2007 7:02 PM Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
