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If you are getting 50 Ohms, that is where your Current short is. The Mounting tab of the 2SC1969 is the collector which is 13V. It MUST be Isolated from ground. Try lifitng one leg of the Bias Diode (across the final) it may be damaged. It should read between 500 and 1600 Ohms across a good...

If you are getting 50 Ohms, that is where your Current short is. The Mounting tab of the 2SC1969 is the collector which is 13V. It MUST be Isolated from ground. Try lifitng one leg of the Bias Diode (across the final) it may be damaged. It should read between 500 and 1600 Ohms across a good...

Ok, I would check to make sure the Final tab is truly isolated from ground. Use an OHM Meter and test the tab to groundit may have a short through the mounting screw. That could cause the high current. Roger </p>

Ok, I would check to make sure the Final tab is truly isolated from ground. Use an OHM Meter and test the tab to groundit may have a short through the mounting screw. That could cause the high current. Roger </p>

Hi, Sorry to hear of your troubles. First of all, If your going to try to use a 2SC1969, for a final, you MUST use the Insulator. The Mounting tab CANNOT be grounded. In the 2SC1969 the mounting tab is the Collector, in the MRF477 the mounting tab is the Emitter. You probably will not...

Hi, Sorry to hear of your troubles. First of all, If your going to try to use a 2SC1969, for a final, you MUST use the Insulator. The Mounting tab CANNOT be grounded. In the 2SC1969 the mounting tab is the Collector, in the MRF477 the mounting tab is the Emitter. You probably will not...

If I am to understand the info from the operator, It was working and he left the room for a bit and came back when he heard a loud POP and it was smoking. I have to aasume it had the correct transformer unit. I also thought it was strange the Both caps were blown apart, and he only sent over...

Hi all, Thanks for the replies, I did find the schematic on CBtricks, and a few other places and got the one sent in email (THNX) . Anyone got an Owners Manual?? (May be asking too much?) Thanks again, Roger </p>

I just was presented with one that had the 2 caps blown to smithereens, Does anyone know what value those large caps on the bottom are supposed to be, and would anyone have a schematic for this puppy? Hoping to get this thing running... Roger <img...

Yes it is, and the Midland and the Emporer were 'Copies' of the 2510. They are 'very' similar. </p>

Yes it is, and the Midland and the Emporer were 'Copies' of the 2510. They are 'very' similar. </p>

Hi, Check the board mounting screws, make sure they are tight.. Also check the microprocessor board connectors. Roger </p>

Hi, Check the board mounting screws, make sure they are tight.. Also check the microprocessor board connectors. Roger </p>

Hey, No Problem, He's a nice guy, and real smart too, anyone would be glad to be mistaken for him, <img src=http://www.ezboard.com/intl/aenglish/images/emoticons/happy.gif ALT=":D"> Roger </p>

Highlander.. I am Rogerbird... and Dan's brother is Roger Valentine. (not the same Roger) Dan and Roger Valentine engineered the Chipswitch, and Roger Valentine marketed it. They are both engineers. I have been working on the 2510 since its release, and radios and electronics since...

Sure, I have been busy, But I can look at your radio, Email me at Rogerbird1@netscape.net and I will give you the info. Roger </p>

Sure, I have been busy, But I can look at your radio, Email me at Rogerbird1@netscape.net and I will give you the info. Roger </p>

Hi, There really isn't. The 'Talkback' mentioned for the HR series is not really talkback but RX feedback caused by the receiver not fully switching over in tx mode. It usually is barely noticable with a stock mic and an external speaker. I am not sure if the switchover problem...

Hi, There really isn't. The 'Talkback' mentioned for the HR series is not really talkback but RX feedback caused by the receiver not fully switching over in tx mode. It usually is barely noticable with a stock mic and an external speaker. I am not sure if the switchover problem...

It looks like the BF198 is not a good substitute for the 2sc2999. The Specifications are different: BF 198 TRANSISTOR SILICON NPN / 40V / 25MA / 400MHz 0.5W The 2SC2999 is a silicon NPN planar epitaxial transistor in a MINI (TO-92S) type package. This device is suitable for use as Low...