Paul, You do NOT want to take one apart to this level! It's never going to operate again. If you look at the lamp in the PIX you will see a white coil wrapped around the bulb. This is the tank for the 90Mhz drive and it sits cocked at a 45 degree angle. The lamp assy can be removed easily via 3 small screws and repaired or modified. The Lamp circuit is designed to put out a bit higher RF level and once the lamp starts it drops down a bit. I would question re-engineering the lamp circuit as it can easily reach 1.5X10-13th at 100 Sec stability and 5X10-14th at 100 Sec. with the filter mod. Unless you have a maser or BVA to compare against how will you know if any modifications are going to help or hurt? The only thing I replace even if it measures OK is the 1.33K resistor as it will "crack" eventually and change value. A 1.3K 5% 1W metal oxide works well. Cheers, Corby

Corby no intent to rework the bulb. Its just I have had good success with bulbs from the FE-XXXX series when they fail to operate by heating the bulb to re-vaporize the "Stuff" that plates out. Wasn't sure if this would be an approach on the 5065 when that day comes for mine. Regards Paul WB8TSL On Tue, Feb 20, 2018 at 1:03 PM, <cdelect@juno.com> wrote: > Paul, > > You do NOT want to take one apart to this level! > > It's never going to operate again. > > If you look at the lamp in the PIX you will see a white coil wrapped > around the bulb. > > This is the tank for the 90Mhz drive and it sits cocked at a 45 degree > angle. > > The lamp assy can be removed easily via 3 small screws and repaired or > modified. > > The Lamp circuit is designed to put out a bit higher RF level and once > the lamp starts it drops down a bit. > > I would question re-engineering the lamp circuit as it can easily reach > 1.5X10-13th at 100 Sec stability and 5X10-14th at 100 Sec. with the > filter mod. > > Unless you have a maser or BVA to compare against how will you know if > any modifications are going to help or hurt? > > The only thing I replace even if it measures OK is the 1.33K resistor as > it will "crack" eventually and change value. > > A 1.3K 5% 1W metal oxide works well. > > Cheers, > > Corby > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. >

		Attila Kinali

On Tue, 20 Feb 2018 10:03:20 -0800 <cdelect@juno.com> wrote: > You do NOT want to take one apart to this level! > > It's never going to operate again. Why not? Is there something you had to break to open it up this far? Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil Stephenson

       Attila Kinali

WRT Rb on the envelope, the 5065A has a built in 'cold trap' to recover the Rb into the reservoir, Instructions on use are in the manual Content by Scott Typos by Siri On Feb 21, 2018, at 10:33 AM, Attila Kinali <attila@kinali.ch> wrote: On Tue, 20 Feb 2018 10:03:20 -0800 <cdelect@juno.com> wrote: > You do NOT want to take one apart to this level! > > It's never going to operate again. Why not? Is there something you had to break to open it up this far? Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil Stephenson _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.