[Boatanchors] More Ranger

[K9FFK]

Larry:

green/brown/silver is 5/1/0.01 = 0.51 ohms.

You are looking at the remnants of a meter multiplier:

SH4 at SW4-B or SH5 in the modulator cathode circuit.

Dick, K9FFK


On 2024-05-21 6:51 p.m., Lawrence Godek wrote:
> For those following this thread and did not see some of the things i 
> said, here is some more info.
>
> I had been using the transmitter with regularity, no idea why all of a 
> sudden it would make a big flash and then quit.  However when i turn 
> the transmitter from off to the Tune position, all the filaments light 
> as normal but there is a missing sound and action.  When i turn the 
> switch to Am or Phone and CW the small red lamp on the front panel 
> lights up but nothing else happens.
>
> In looking around a i found 3 pieces of a resistor, green/brown/silver 
> which means it it 67 ohms divided by 100.  well i don't have any 
> resistors like that shown on the parts list. However on the backside 
> of the back wafer on that switch there is another resistor of 
> identical value.  There are only two shunts with a value close to that 
> and they are listed as .51 ohms
>
> It would appear that as these transmitters went along in their 
> development changes in some values were made bu documentation did not 
> follow up.  I am wondering that with all the rangers built that are 
> still around if there isn't someone out there with perhaps a manual 
> reflecting these changes.
>
> Needless to say if i can't find where this resistor blew up it's gonna 
> be difficult to fix this rig.  I don't see anything anyplace that has 
> the remenents of that resistor not even the wire stubs that were 
> soldered to something.
>
> A challenge indeed.
>
> Larry W0OGH
>
>
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-- 
73 K9FFK