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The cap is C120 on the A13 board so its A13C120. Thanks for looking.

On Thu, Oct 25, 2018 at 03:14 AM, lop pol wrote: Hi Lop Pol, > > Re: Anyone have a 5.5 to 18PF variable ceramic trimmer they would like to sell > > > > I added a photo of the capacitor. Just in

According to the later manual Type G switched from UHF (131-012) to BNC (131-277) at S/N 9480. No idea in which year that was. Albert

I don't know the G serial number at which Tek switched from UHF to BNC*, but the 1962 catalog shows UHF while 1963 is BNC**. I think I have a newer manual at home, I'll try to remember to

Nick, I have a 2246A that I had to overhaul, which most likely has the identical power supply for your 2247A. I would do a search for the 2246A power supply also here. So I will refer to the

I run into the same problem many times when restoring radios. The original trimmers are simply not available So, I order new modern SMD trimmers from Mouser, and simply solder legs onto them. Works

I added a photo of the capacitor. Just in case. /g/TekScopes/photo/76822/0?p=Name,,,20,1,0,0

It is not critical.

Hi Nick, can't really give you other troubleshooting tips for a dead 2247A power supply, as I fortunately never had this problem with my own scope, but I hope in the end its something easy to fix.

Can you send me a pic of the trimmer you need and how much room is there to mount it? 73 Bill, WA2DVU

I ordered a 4 to 34PF from jameco but I would like another option. I just tapped it and I lost the trace on the 468 I'm working on. Good news is I found a dead transistor on the timing board. Now I

My G also has BNC connectors. If it's anything like the other 500 series equipment, I think the transition was in the mid-to-late 1960s. My 535A has factory-fitted BNCs as well. Chris

Replacement 12AU6 installed in addition to a substitute for the missing 6AK5, adjustments to gain, DC balance and vertical position range as expected, plugin now seems to work perfectly. That wasn't

(quote doesn't seem to work so I put the little arrows in like Usenet, hope it is clear enough) Unless those switches are dirty at many ranges or something it is not really likely they need to be

Thanks. Has anyone tried Caig Labs Deoxit? Mike N2MS

My G (serial number just under 10K) has holes in the front panel for the original connectors, but is loaded with BNCs which look factory installed.? Anyone know when this transition took

Chris's manual is for the 53G (12AU6x2, 12AT7x2, 12AT7), while his plugin is the later, faster G (6AK5x2, 12AU6x2, 12AU6x2, 12AT7). I edited the wiki page to mention that 53G has five tubes while G

This might indeed help, but be cautious when doing it. There are posts on this forum where the correct technique is laid out - it is very easy to damage the cam-operated contacts. Also, note that the

I have two 475 scopes. Both have developed a similar probe calibration problem on one channel. I am using the scope calibration signal. I have verified results with multiple probes First scope -

Jerry, Thank you very much for the pointer. That manual matches what I've got. A replacement 12AU6 (most of the vacuum has escaped from one of the ones in the plugin) has just arrived so I'll see if