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7/23/2007 11:41:01 AMPatrick
I am trying my first attempt to recap an old Zenith from around the early fifties. I have beens studing the differnt sites learning what I can. I have run into a capacitor that concerns me and I can not find any referance to any thing like this.
Printed on the capacitor
(mfd .05 wvdl 200 out side foil) I under stand this is but,it has a tape around it that has 1000 printed on it. It looks like it came from the factory this way. What does the 1000 mean? Does it change anything, a part # etc.
Thanks for any help.
7/23/2007 1:54:36 PMJon
:I am trying my first attempt to recap an old Zenith from around the early fifties. I have beens studing the differnt sites learning what I can. I have run into a capacitor that concerns me and I can not find any referance to any thing like this.
:Printed on the capacitor
:(mfd .05 wvdl 200 out side foil) I under stand this is but,it has a tape around it that has 1000 printed on it. It looks like it came from the factory this way. What does the 1000 mean? Does it change anything, a part # etc.
:Thanks for any help.
Patrick,
I would first consult the schematic. You can look it up by the model number under the Resources section on this sight. Determine what it should be and go from there. It does not sound like a Zenith part number so there is no telling what it means. try to post a pic of it, maybe someone could i.d. it.
Jon.
:
7/23/2007 8:54:31 PMPatrick
:I am trying my first attempt to recap an old Zenith from around the early fifties. I have beens studing the differnt sites learning what I can. I have run into a capacitor that concerns me and I can not find any referance to any thing like this.
:Printed on the capacitor
:(mfd .05 wvdl 200 out side foil) I under stand this is but,it has a tape around it that has 1000 printed on it. It looks like it came from the factory this way. What does the 1000 mean? Does it change anything, a part # etc.
:Thanks for any help.
:
7/23/2007 9:10:05 PMPatrick
how do you upload a picture? I have a good one if I can just figure out how to get it on here. I looked at the schematics for a Zenith model 6R886Z and I am not seeing it. I might be just reading them wrong due to lack of knowledge but, I have located the pins on the tubes and it dosent seem to be there. It is going between tube 12SA7 GT pin S and 12SK7 GT Pin SU Like I said earlier the origional print on the cap is mfd .05 wvdl 200 With a band around it that says 1000
::I am trying my first attempt to recap an old Zenith from around the early fifties. I have beens studing the differnt sites learning what I can. I have run into a capacitor that concerns me and I can not find any referance to any thing like this.
::Printed on the capacitor
::(mfd .05 wvdl 200 out side foil) I under stand this is but,it has a tape around it that has 1000 printed on it. It looks like it came from the factory this way. What does the 1000 mean? Does it change anything, a part # etc.
::Thanks for any help.
::
7/23/2007 10:42:19 PMDennis Wess
Patrick,
To post a photo you must first store it somewhere on the web....a photo hosting site such as www.photobucket.com works well. then......once you do that follow the instructions as noted in this posting....
http://www.nostalgiaair.org/Forums/Messages/138/M0051138.htm
7/23/2007 10:56:47 PMJon
:how do you upload a picture? I have a good one if I can just figure out how to get it on here. I looked at the schematics for a Zenith model 6R886Z and I am not seeing it. I might be just reading them wrong due to lack of knowledge but, I have located the pins on the tubes and it dosent seem to be there. It is going between tube 12SA7 GT pin S and 12SK7 GT Pin SU Like I said earlier the origional print on the cap is mfd .05 wvdl 200 With a band around it that says 1000
:::I am trying my first attempt to recap an old Zenith from around the early fifties. I have beens studing the differnt sites learning what I can. I have run into a capacitor that concerns me and I can not find any referance to any thing like this.
:::Printed on the capacitor
:::(mfd .05 wvdl 200 out side foil) I under stand this is but,it has a tape around it that has 1000 printed on it. It looks like it came from the factory this way. What does the 1000 mean? Does it change anything, a part # etc.
:::Thanks for any help.

Patrick,
I think you should be o.k. with replacing the cap with a .05mfd of at least 200v. rating. You can go higher than 200 but not lower. I am in the habit of ordering all my caps at 630 v. so I dont have to worry about it. Looking at the schematic, it is a conventional ac/dc set so I do not see anything even coming close to 1,000 volts. The number 1000 could be a series or run number but it sounds like you have accuratly identified the correct value. Good luck
:::

7/24/2007 12:41:49 PMPatrick
Thanks for all of your help Jon I think your are right but I am going to try this picture upload so you can see it a picture is allways beter try this link
http://s181.photobucket.com/albums/x7/hotrodd53/?action=view¤t=Image009.jpg
::how do you upload a picture? I have a good one if I can just figure out how to get it on here. I looked at the schematics for a Zenith model 6R886Z and I am not seeing it. I might be just reading them wrong due to lack of knowledge but, I have located the pins on the tubes and it dosent seem to be there. It is going between tube 12SA7 GT pin S and 12SK7 GT Pin SU Like I said earlier the origional print on the cap is mfd .05 wvdl 200 With a band around it that says 1000
::::I am trying my first attempt to recap an old Zenith from around the early fifties. I have beens studing the differnt sites learning what I can. I have run into a capacitor that concerns me and I can not find any referance to any thing like this.
::::Printed on the capacitor
::::(mfd .05 wvdl 200 out side foil) I under stand this is but,it has a tape around it that has 1000 printed on it. It looks like it came from the factory this way. What does the 1000 mean? Does it change anything, a part # etc.
::::Thanks for any help.
:
:Patrick,
:I think you should be o.k. with replacing the cap with a .05mfd of at least 200v. rating. You can go higher than 200 but not lower. I am in the habit of ordering all my caps at 630 v. so I dont have to worry about it. Looking at the schematic, it is a conventional ac/dc set so I do not see anything even coming close to 1,000 volts. The number 1000 could be a series or run number but it sounds like you have accuratly identified the correct value. Good luck
::::
7/24/2007 4:54:49 PMDennis Wess
hmmmm......let's see if I can help out.....

7/24/2007 5:00:05 PMDennis Wess
Nope.......didn't work. There has to be something wrong with tthat link back to photobucket.
7/24/2007 9:50:40 PMEdd
:Nope.......didn't work. There has to be something wrong with tthat link back to photobucket.

From the first time that I referred to this post 'mo info has been added....specifically the model and the
connections involved in the caps wire in.....also I retrieved your photo..... and put it here: ............[xXx]



Marked up chassis schema.................[xXx].



I can certainly see the 1000 that has been ink stamped on the unit but there is also a bit less legible
second number at the very top...like a 1990 ?..almost looking like it is offset double stamped. The
high light intensity and reflection precludes a positive ID on it.
Neither number rings with me, and you apparently figured the principal info of the unit being a .05 ufd unit
at a 200 Volt rating . With what additional info I now have, I would say that you might be able to refer
to the cap, if it has a Zenith part number placed upon it and find it to be a # 22-829...with the 22 being
the prefix that Zenith uses to ID caps and the suffix zeroing further going to the exact unit value.

With your reference to the pin connections, and referring to the marked up schema, with the green line
channeling I placed , that would be capacitor C3. Its purpose along with high value resistive shunt RI is
to establish a safe AC and DC passive inner connection between the chassis common negative wiring and
the sets METAL chassis. The capacitive value is high enough for adequate RF and AF bypassing, while the
high resistive value completes a DC coupling , yet is AC and DC shock hazard safe.

My thoughts on the stamping now, was that the act possibly was placed by some final Quality/ safety
control inspection associated with the presence of those components installation, along with their physical
placement and proper lead dress......and no, also not the possibility that the unit was HI-POTTED
(a non invasive / destructive high voltage insulation break down test) for 1000 v..or else they would have
chosen a cap of that rating and have its manufacturer place that marking upon it.

Another equally important inspection area would be cap C5 which receives raw switched AC just past
the switch, therefore, that components quality is equally important. Notice how they hopped its voltage
spec up to 400 VDC . I use even higher specs and a special cap, being of two types that are UL rated and intended to be used across the AC line or from an AC leg to chassis ground.



73's de Edd







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