Well, I found it, the thermal fuse is open circuit. If I briefly bypass it with a jumper wire, the oven pulls the expected current.
Looks like I need something that will trip at roughly around 115C, rated to 1.0A (HP Part number 10811-80008) Hopefully I can find something in Akihabara to make it easier to get my hands on ASAP... Jared ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Wednesday, December 1st, 2021 at 00:41, Robert LaJeunesse <[email protected]> wrote: > That film cap does look a little cooked. Since it is a 2uF 20% 50V part a > more common 2.2uF 10% 63V part would likely be an acceptable substitute, and > basically still within overall tolerance. Judging from the teflon solder cup > used I suspect insulation resistance is a critical parameter. Be sure to > clean away any flux remaining after soldering. > > Bob L. > > > Sent: Tuesday, November 30, 2021 at 9:36 AM > > > > From: "Jared Cabot via time-nuts" [email protected] > > > > To: "Discussion of precise time and frequency measurement" > > [email protected] > > > > Cc: "Jared Cabot" [email protected] > > > > Subject: [time-nuts] Re: HP 5065A, no 2nd harmonic. > > > > ... > > > > Also, I noticed that a 2.0uF, 20% film capacitor in there is looking like > > it's had a bit of heat-stroke. > > > > It measures 2.119uF, 0.22ohm ESR, with a dissipation of 0.004 @ 40V, @ > > 1kHz, so it seems to test ok. > > > > Does this look like it needs to be replaced (picture link below)? I can't > > find the same part on Digikey/Mouser, but it seems like Keysight have them > > as 'orderable' status. > > > > Details are as follows: P/N: 0160-4947 Part Description: Capacitor-Fixed > > 2uF +-20PCT 50V polyester metallized THT > > > > https://i.imgur.com/aZ0KUD8.jpg > > > > Thanks! > > > > Jared > > time-nuts mailing list -- [email protected] -- To unsubscribe send an > email to [email protected] > > To unsubscribe, go to and follow the instructions there.
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