Hickok 600A tube tester - Printable Version

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+--- Thread: Hickok 600A tube tester (/showthread.php?tid=18046)

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RE: Hickok 600A tube tester - vecher - 07-01-2018

OK, Have been using this for a while and all was good.. I tried to turn on tonight and nothing.. NO indication on meter for Line adjust.. I checked the switch and it was good..

Anyone know what the resistance of primary of transformer should read?

I hope the transformer didn't go belly up??

Skip

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RE: Hickok 600A tube tester - Phlogiston - 07-01-2018

I think one of the bulbs (51) is a fuse.

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RE: Hickok 600A tube tester - morzh - 07-02-2018

There is that main bulb which is never lit and which is the fuse. Right by the switch. Check that first.

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RE: Hickok 600A tube tester - vecher - 07-02-2018

Yup Did that.. Was able to get it sort of working..I think it has something to do with the power cord..If I plug it in to different sockets I get different readings.. So will replace it first to see if that's it..

Skip

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RE: Hickok 600A tube tester - John R - 07-02-2018

Skip,
Yes, the Hickok 600 series testers are notorious for the power cord wires inside the rubber jacket crystallizing . Use at least 16 AWG.
If you strip the old jacket off after replacing there is greater than 90% chance you will find crystallized wires. Mine were bad the entire length of the cord. Manufacturing problem 
John

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RE: Hickok 600A tube tester - vecher - 07-02-2018

OK replaced power cord Still same problem.. Here is what i noticed..

When you set the line adjust pot to read the right filament voltage the meter reads say X When you push p7 again meter reads different say Y But filament voltage doesn't change.. So tells me it some where in the Line adjust circuit .. something is intermittent maybe the push button.. I did clean the contacts and it seems to work OK.. I will try to draw out the line adjust circuit..

Skip..

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RE: Hickok 600A tube tester - vecher - 07-03-2018

OK,, Need to know what the resistors are bin following pictures.. R1,R2 ETC.. And values.. Mine seem to not be whats on schematic some of them.

Starting with these..

[Image: https://farm2.staticflickr.com/1808/42465958324_7c3a885ce5_b.jpg]



[Image: https://farm2.staticflickr.com/1763/42465959614_6db8a022a9_b.jpg]


[Image: https://farm1.staticflickr.com/833/42465964284_3c5ed200b9_z.jpg]

Thanks
Skip

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