Tappan wall ovens - Bloomfield Hills MI
- Thread starter carlvs
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Magnetron
I’m working on finding a replacement magnetron for it or fixing it. I was told by an old ham radio and radar guy that old magnetrons will arc out after siting for a long time unused and one way to stop this from happening is to step the voltage up slow. I did this with no improvement. So it’s back to what I originally was thinking bad RF seals. I think I may put modern guts in it and box up the original parts to preserve them in a working order.
I’m working on finding a replacement magnetron for it or fixing it. I was told by an old ham radio and radar guy that old magnetrons will arc out after siting for a long time unused and one way to stop this from happening is to step the voltage up slow. I did this with no improvement. So it’s back to what I originally was thinking bad RF seals. I think I may put modern guts in it and box up the original parts to preserve them in a working order.
Its Alive
Great work Anthony, I think you are the first person I know that has gotten one this old working again, this may inspire me to get my 1962 water cooled Tappan built Westinghouse working.
While I too have considered putting in a modern magnetron I am going to try to fix the orignal system first, although I am going to install ours in the museum where it will only be used occasionally, the museum kitchen will have about 30 MW ovens hooked up and most are some variety of combination micro-thermal units.
I will stay on the lookout for parts for your unit.
Great work Anthony, I think you are the first person I know that has gotten one this old working again, this may inspire me to get my 1962 water cooled Tappan built Westinghouse working.
While I too have considered putting in a modern magnetron I am going to try to fix the orignal system first, although I am going to install ours in the museum where it will only be used occasionally, the museum kitchen will have about 30 MW ovens hooked up and most are some variety of combination micro-thermal units.
I will stay on the lookout for parts for your unit.
ovrphil
Well-known member
Success!
Excellent!
Excellent!
ovrphil
Well-known member
!!! whoah - and part replacement might be a long search or maybe a custom shop will make? Here's where 3D printing would be nice.
That may be one of the coolest things I've ever seen! It would be fun to cook a big hunk o beef in. Would it be able to use modern popcorn bags? What happen if you start cook time before warm up? Is it just one power level? The other controls are for thermal cooking? What is the little drawer for?
ovrphil
Well-known member
Cardboard paper - laser 3D could do it? A one-off would be most likely unfriendly in cost.
Just thinking ...could you approach some cnc shop that would be able to cut and shape a duplicate? I worked around factories for automotive and saw plenty of tool and die...so, can't help asking why not, but ...maybe there's a part in a unit, somewhere out there, just waiting to be adopted. Hoping for you.
Just thinking ...could you approach some cnc shop that would be able to cut and shape a duplicate? I worked around factories for automotive and saw plenty of tool and die...so, can't help asking why not, but ...maybe there's a part in a unit, somewhere out there, just waiting to be adopted. Hoping for you.
ovrphil
Well-known member
I don't know the requirements for that piece, but that sounds very creative! Thomas Edison would have as much or less to work with, creating a lighting filament. 
kb0nes
Well-known member
Anthony,
Could you provide more detail on the RF gasket? I'd like to see ID and OD as well as overall thickness. It appears to have been an embossed with a waffled pattern, if this is the case it would be good to know the material thickness before it was formed too.
A few more good closeup photos wouldn't hurt either. Photos of the mating surfaces of the tube and the waveguide could help too.
As both a Ham (RF guy) and machine shop manager, perhaps I might be able to help with this. I looked in the Parker Chromerics catalog and they sell expanded metal foil. It may be child's play to duplicate this part.
Phil
Could you provide more detail on the RF gasket? I'd like to see ID and OD as well as overall thickness. It appears to have been an embossed with a waffled pattern, if this is the case it would be good to know the material thickness before it was formed too.
A few more good closeup photos wouldn't hurt either. Photos of the mating surfaces of the tube and the waveguide could help too.
As both a Ham (RF guy) and machine shop manager, perhaps I might be able to help with this. I looked in the Parker Chromerics catalog and they sell expanded metal foil. It may be child's play to duplicate this part.
Phil
kb0nes
Well-known member
Anthony,
Sorry for the delay, things are been pretty crazy for me for the past month or two. You can try to call whenever, evenings are probably best, leave your number if you hit my VM.
You could email me at [email protected] if you like also. Would love to see a few more photos of the gasket. Reasonably accurate ID and OD measurements as well as the base material thickness and the expanded thickness would be good to have, should do fine with a standard caliper. Also any hint as to what kind of metal its made from? I think all the Parker Chomerics expanded RF gasketing material is Monel (Google Porcupine Metalastic). Material probably doesn't really matter too much but it should be pretty conductive.
Photos of the two mating flanges may be helpful too. Are they pretty flat (at in machined?). Sheet metal or thicker? Good to know what kinds of gaps need to be filled.
Sorry for the delay, things are been pretty crazy for me for the past month or two. You can try to call whenever, evenings are probably best, leave your number if you hit my VM.
You could email me at [email protected] if you like also. Would love to see a few more photos of the gasket. Reasonably accurate ID and OD measurements as well as the base material thickness and the expanded thickness would be good to have, should do fine with a standard caliper. Also any hint as to what kind of metal its made from? I think all the Parker Chomerics expanded RF gasketing material is Monel (Google Porcupine Metalastic). Material probably doesn't really matter too much but it should be pretty conductive.
Photos of the two mating flanges may be helpful too. Are they pretty flat (at in machined?). Sheet metal or thicker? Good to know what kinds of gaps need to be filled.
Up date
So after contacting a few company's that make this kind of gasket all told me they would not do to me only needing one
so I took an old magnetron gasket off a rader range starched it out and~ it now works like new! who is happy this guy!
So after contacting a few company's that make this kind of gasket all told me they would not do to me only needing one
so I took an old magnetron gasket off a rader range starched it out and~ it now works like new! who is happy this guy!Similar threads
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