HP 608C Repair.

[neo]

Sorry if i seemed to have abandoned this project, i just needed a break to sit and think. I got an idea and so i'm back at it, i fed 13 MHZ into the attenuator and it attenuated. Meaning that it just refuses to pick up the oscillation, i'm beginning to doubt my ability  to resurrect this boat anchor 

[Cyberdragon]

Is L17 blown?

[neo]

Is L17 blown?

As far as i can test it, no.

[Cyberdragon]

Where did you feed the attenuator input when you saw it work?

Also did you check the wire continuity?

[neo]

I probed this point here and got the dialed in frequency.

[Cyberdragon]

Doesn't matter.

Did you check the wire that connects L17 to the attenuator for continuity?

[neo]

Continuity across the inductor but i'm not getting a connection to the tines.

EDIT; there is continuity to the tines.

[neo]

The thing just sprung to life, it seems all i needed to do to fix it was rule out every possible motive except for old and cranky. 

[Cyberdragon]

Exactly as I suspected, bad wire or solder joint. You poked it and restored continuity.

Jiggle it a little bit, the bad connection is still there.

[neo]

I've jiggled the coaxial every which way and taken a good long look at the joint on the attenuator probe, all kosher. Then i tweaked the single wind inductor on the thing and it sprung to life, reattached it the sliding mechanism it and it still works.

[Specmaster]

I've jiggled the coaxial every which way and taken a good long look at the joint on the attenuator probe, all kosher. Then i tweaked the single wind inductor on the thing and it sprung to life, reattached it the sliding mechanism it and it still works.

Excellent news, so you now have a working unit.

From mobile device so predictive text might have struck again [emoji83]

[neo]

I've jiggled the coaxial every which way and taken a good long look at the joint on the attenuator probe, all kosher. Then i tweaked the single wind inductor on the thing and it sprung to life, reattached it the sliding mechanism it and it still works.

Excellent news, so you now have a working unit.

From mobile device so predictive text might have struck again [emoji83]

Mostly anyway, the percent modulation meter is still screwy but i'm not sure i want to dig into THAT without a tube tester. Time will tell how well it is fixed, i suppose.

[neo]

Having knocked it around plenty getting it back in the case and onto it's shelf i think it'll keep working. With how much i moved it for it to still work eliminates a short, almost definitely. Fingers crossed.