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Philco 16 l,Putt putt and no reception
12/30/2007 1:56:10 AMIra
Hi,I recently came across a Philco 16 l console,11 tube with shadow tuning and the fake speakers.After checking the tubes and doing a slow power up to start out since I am having a problem getting the chassis loose,at first I would get a putt putt through the speaker and the 2 6a3's would glow a purplish blue tinge and keep time with the putt.After swapping out the 5z3 with an 80,the glowing stopped but the putt was still there.Also when I turn the band knob to the different bands I can get the clicking through the speaker but no reception.As far as the chassis,I am trying to get it out but have trouble due to limited use of my hands.I hope someone can steer me in the direction to get it going and pray it isn't the transformer.PS by touching the grids of the sheilded tubes,I can get the putting to disappear until I let go.Thanks for any help.
12/30/2007 4:33:40 AMJon
:Hi,I recently came across a Philco 16 l console,11 tube with shadow tuning and the fake speakers.After checking the tubes and doing a slow power up to start out since I am having a problem getting the chassis loose,at first I would get a putt putt through the speaker and the 2 6a3's would glow a purplish blue tinge and keep time with the putt.After swapping out the 5z3 with an 80,the glowing stopped but the putt was still there.Also when I turn the band knob to the different bands I can get the clicking through the speaker but no reception.As far as the chassis,I am trying to get it out but have trouble due to limited use of my hands.I hope someone can steer me in the direction to get it going and pray it isn't the transformer.PS by touching the grids of the sheilded tubes,I can get the putting to disappear until I let go.Thanks for any help.

Ira,
Sounds like you need to replace the electrolytic capacitors.That sound is commonly called motor boating. The schematic for the model 16L shows them to be 8 mfd. Go ahead and replace the others while you are at it. The schematic does not show 6A3's on this set and I don't think they would be a suitable substitution for the correct ones. you can pull up the schematic under the resources section and pay attention to the "changes" pages and determine which "code" yours is-this is a reference to a particular production run on this model that identifies changes that were made.There should be a code number on the label that identifies the model number. good luch-this is a nice set.
Jon.

12/30/2007 5:59:39 PMDoug Criner
Ira, your prayers have been answered - it's not the transformer.

If Jon's suggestion of replacing the filter caps doesn't fix it, you should go ahead and replace the other caps.

If you have limited use of your hands, you may need to get some help. I supposedly have complete use of my hands, and still struggle to pull some radio chassis and to replace caps.

There are a few different things that can cause motorboating, which is a low-frequency oscillation. For example, a capacitor may charge up until it or some other component leaks or discharges - causing a audible "putt." Then the same thing is repeated.
Doug

:I hope someone can steer me in the direction to get it going and pray it isn't the transformer.

12/31/2007 1:03:41 AMIra
:Ira, your prayers have been answered - it's not the transformer.
:
:If Jon's suggestion of replacing the filter caps doesn't fix it, you should go ahead and replace the other caps.
:
:If you have limited use of your hands, you may need to get some help. I supposedly have complete use of my hands, and still struggle to pull some radio chassis and to replace caps.
:
:There are a few different things that can cause motorboating, which is a low-frequency oscillation. For example, a capacitor may charge up until it or some other component leaks or discharges - causing a audible "putt." Then the same thing is repeated.
:Doug
:
::I hope someone can steer me in the direction to get it going and pray it isn't the transformer.
: Hey guys,thanks for the info,I goofed in the model #,it is a model 116,I forgot to add the extra 1.I'll get my nephew to help with the chassis for the caps.Thanks again for the help and have a Happy and Safe New Year,Ira.


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