New Member SCR8 issues.

[Lino]

Looks good! I tried to send you a private message but the site requires a minimum number of posts first I believe, before you can use that feature.

That explains why I haven't been able to PM. We are currently experiencing a postal strike here so mailing it right now would be pointless. Can i check back with you once this strike is over? Maybe I'll be able to PM by then too. Thanks Caution!

 

[caution]

Yes absolutely!

 

[Lino]

On a second reading, you wrote that you think you blew something.
Check the resistors R164 (4.7 ohm) and I believe it's R204 (2.2 ohm).
They should be fusible resistors (usually gray in color).
One might have blown.
You might have to lift one of the legs to test.

R164 does test bad. .97 K Ohm. Now to figure out the replacement. Should I just buy a variety pack? I’m seeing different wattages and I’m afraid I have no idea what I need. The coloured bands will tell me that I assume?

 

[Superduper]

No, the bands tell value, not wattage. Typically if the resistor is comparable in size to the majority of other resistors, it will be 1/4 watts. 1/2 watt resistors are significantly more beefy and unmistakably larger. Also fusible resistors are not “standard” resistors. They are rare in modern equipment because there are better ways to design a circuit these days than rely on resistors that blow up so you may have to find NOS offerings. Alternatively if you can’t locate true fusible resistors, at least use flameproof ones. That way if it burns up, at least it won’t catch on fire.

 

[Lino]

No, the bands tell value, not wattage. Typically if the resistor is comparable in size to the majority of other resistors, it will be 1/4 watts. 1/2 watt resistors are significantly more beefy and unmistakably larger. Also fusible resistors are not “standard” resistors. They are rare in modern equipment because there are better ways to design a circuit these days than rely on resistors that blow up so you may have to find NOS offerings. Alternatively if you can’t locate true fusible resistors, at least use flameproof ones. That way if it burns up, at least it won’t catch on fire.

Ok. good thing I asked. There are so many options available. Glad I didn’t go ahead and order a bunch. I’ll research and see what I can find. Really appreciate the insight. Thanks so much.
L