Re: [Repeater-Builder] Mastr II UHF Base Station
That I am not sure... I am going to be picking up this equipment sometime this week and have to haul it home before I can check it out. All my knowledge thus far is what I have heard from 2 different GE Radio guys on the phone...Thanks! Chuck Kelsey [EMAIL PROTECTED] wrote: Is the combining done externally to the two PA units? If so, you should be able to split them and keep one as a reserve.I just picked up a PA that appears was from a similar arrangement. It had two SO-239's on the heatsink side, both entering the PA compartment. Inside, there was no driver board. I drilled and tapped so I could install a driver and it appears to work just fine.ChuckWB2EDV Hello ALL -I am looking at acquiring a GE Master II UHF Base station. This is a 300 watt solid state transmitter, which how I understand it, has 2 PAs running in parallel.I am planning to convert this to repeater use, and use it as a main transmitter, and bring other receive sites in via links into a GE voter.What I am wondering is, can these amps be run separately, or do they always have to run together in parallel?I am thinking that it would be neat to run one amp alone at like 100 watts, then if need be, there is another un-used amp sitting there ready to run.Anyone have any expertise on these? Yahoo! Groups Links* To visit your group on the web, go to:http://groups.yahoo.com/group/Repeater-Builder/* 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/ Brings words and photos together (easily) with PhotoMail - it's free and works with Yahoo! Mail. YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [Repeater-Builder] Mastr II UHF Base Station
I am looking at acquiring a GE Master II UHF Base station. This is a 300 watt solid state transmitter, which how I understand it, has 2 PAs running in parallel. It's actually 200 watts, and yes, there are two final PA's, each capable of 100 watts output, that are combined. However, each final PA requires around 35 watts of drive - the final PA's are really the same as a 100 watt station PA, but without the 40 watt driver board. Drive to the PA's is provided by a standard 100 watt PA. So, what you have is the exciter (200 mW) driving the intermediate PA (100 watt, attached to the main station chassis), which gets power-divided to feed the two final PA's, the output of which then are combined to yield 200 watts. What I am wondering is, can these amps be run separately, or do they always have to run together in parallel? Not really, since each requires about 35 watts drive, so you still need something to drive them with. If you only want 100 watts, then just run the 100 watt IPA to the antenna and leave the two final PA's on the shelf as spare parts. --- Jeff Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * 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/
Re: [Repeater-Builder] Mastr II UHF Base Station
Steve, Yes you can. This base uses 1 RF PA to drive 2 RF PA's. There is a splitter and combiner before the 2 PA's and after. You can remove the splitter and combiner but you will need to turn down the 1st PA. It is not hard to do but you would be best to run the as is, just lower the drive a little and have about 200 watts out. They will run cool, last a long time, and give you less trouble in the long run. I have one here, and it runs 150 watts and does not even get warm. I also have one that was modified and it runs 125 watts. It does get a little warm but not bad. I have fans on them to help keep them cool. Charles Miller, WD5EEH - Original Message - From: Steve Rubeck [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, February 04, 2006 1:08 PM Subject: [Repeater-Builder] Mastr II UHF Base Station Hello ALL - I am looking at acquiring a GE Master II UHF Base station. This is a 300 watt solid state transmitter, which how I understand it, has 2 PAs running in parallel. I am planning to convert this to repeater use, and use it as a main transmitter, and bring other receive sites in via links into a GE voter. What I am wondering is, can these amps be run separately, or do they always have to run together in parallel? I am thinking that it would be neat to run one amp alone at like 100 watts, then if need be, there is another un-used amp sitting there ready to run. Anyone have any expertise on these? - Yahoo! Mail - Helps protect you from nasty viruses. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * 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/
Re: [Repeater-Builder] Mastr II UHF Base Station
Its been a while,but from what I remember-no! They use one PA to drive two more which only have the finals and Wilkinson combiners,so they wont work stand-alone.Nice find though,I'd use it as is,but prepare to watch your electric meter spin a lot faster!!! 73,Lee Steve Rubeck wrote: Hello ALL - I am looking at acquiring a GE Master II UHF Base station. This is a 300 watt solid state transmitter, which how I understand it, has 2 PAs running in parallel. I am planning to convert this to repeater use, and use it as a main transmitter, and bring other receive sites in via links into a GE voter. What I am wondering is, can these amps be run separately, or do they always have to run together in parallel? I am thinking that it would be neat to run one amp alone at like 100 watts, then if need be, there is another un-used amp sitting there ready to run. Anyone have any expertise on these? Yahoo! Mail http://us.rd.yahoo.com/mail_us/taglines/virusmail/*http://mail.yahoo.com - Helps protect you from nasty viruses. YAHOO! GROUPS LINKS * Visit your group Repeater-Builder http://groups.yahoo.com/group/Repeater-Builder on the web. * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service http://docs.yahoo.com/info/terms/. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * 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/
Re: [Repeater-Builder] Mastr II UHF Base Station
I had access to a Motorola MSR2000 some time back. The only way /\/\ would ship it was at 75 watts output ... the station license said 20 watts. The PA deck consisted of one PA transistor associated microstrip circuitry driving three more in paralle. Bypassing the three and using just the driver stage equaled 16? watts ... well within the license limitations. Neil - WA6KLA Q wrote: Its been a while,but from what I remember-no! They use one PA to drive two more which only have the finals and Wilkinson combiners,so they wont work stand-alone.Nice find though,I'd use it as is,but prepare to watch your electric meter spin a lot faster!!! 73,Lee Steve Rubeck wrote: Hello ALL - I am looking at acquiring a GE Master II UHF Base station. This is a 300 watt solid state transmitter, which how I understand it, has 2 PAs running in parallel. I am planning to convert this to repeater use, and use it as a main transmitter, and bring other receive sites in via links into a GE voter. What I am wondering is, can these amps be run separately, or do they always have to run together in parallel? I am thinking that it would be neat to run one amp alone at like 100 watts, then if need be, there is another un-used amp sitting there ready to run. Anyone have any expertise on these? Yahoo! Mail http://us.rd.yahoo.com/mail_us/taglines/virusmail/*http://mail.yahoo.com - Helps protect you from nasty viruses. YAHOO! GROUPS LINKS * Visit your group Repeater-Builder http://groups.yahoo.com/group/Repeater-Builder on the web. * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service http://docs.yahoo.com/info/terms/. Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * 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/
