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identifying a buffer capacitor
11/15/2005 6:56:00 AMBrian
From the schematic for models 1621-D to 1629-D Stewart Warner, can someone identify the buffer capacitor for me and what value?
11/15/2005 12:26:03 PMBill
Brian, how are you powering this set?

:From the schematic for models 1621-D to 1629-D Stewart Warner, can someone identify the buffer capacitor for me and what value?

11/15/2005 12:35:44 PMThomas Dermody
This set originally used A and B batteries. If someone added a vibrator supply to this set at a later date, the buffer capacitor is the capacitor across the high voltage leads of the power transformer. That is, with a center tapped high voltage winding, the two end leads (not the center tap) are the leads which the buffer capacitor is placed between. This capacitor is usually from .01 to .05 MFD, and is rated at about 1,000 volts. These can be found at www.tubesandmore.com. DO NOT USE ELECTROLYTIC CONDENSERS HERE!!!! This is alternating current. It only becomes rectified after it passes either throug a rectifying diode (tube or solid state) or through the 2nd section of a synchronous vibrator.
11/15/2005 1:08:29 PMRadiodoc
:From the schematic for models 1621-D to 1629-D Stewart Warner, can someone identify the buffer capacitor for me and what value?

Brian,

You state "From the schematic for models 1621-D to 1629-D Stewart Warner...". Is what you are referring to as a 'buffer' capacitor on that schematic? Perhaps you could describe in more detail what you are referring to as a buffer capacitor.

Radiodoc

11/16/2005 1:50:54 AMBill
Brian,
If you do have a vibrator power supply what is the vibrator number? The voltage for the buffer cap could be as high as 1600 V.

Bill

::From the schematic for models 1621-D to 1629-D Stewart Warner, can someone identify the buffer capacitor for me and what value?
:
:Brian,
:
:You state "From the schematic for models 1621-D to 1629-D Stewart Warner...". Is what you are referring to as a 'buffer' capacitor on that schematic? Perhaps you could describe in more detail what you are referring to as a buffer capacitor.
:
:Radiodoc
:

11/16/2005 1:53:09 AMBill

Brian,
If you do have a vibrator power supply what is the vibrator number? The voltage for the buffer cap could be as high as 1600 V.

Bill

From the schematic for models 1621-D to 1629-D Stewart Warner, can someone identify the buffer capacitor for me and what value?

11/16/2005 7:50:15 PMEdd

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Brian:
From your supplied references , I can't, but IF you will step up to 1637-D and check it out, you will be able to look at it for a like analogy. The vibrator transformer is located at bottom center of that schema....line item # 49.... and check as mentioned, on its secondary winding and find line item # 48,
which in this case, is the specified .005 ufd /1500
buffer capacitor.I can asssume that same transformer was used in many different models and they had found that .005 was the proper resonating value for that secondary at its specified loading. I always liked to use a disc ceramic for replacement reliability, since they were initially using a paper type...higher voltage disc ceramics are still scroungable from old TV parts stocks.(But some times one has to parallel a few values for the capacitance , but the good part is that 2k 3k 5k PIV breakdown ratings are available in those caps.)
73's de Edd

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From the schematic for models 1621-D to 1629-D Stewart Warner, can someone identify the buffer capacitor for me and what value?



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