philco model 60

[d smith]

i'm just very new to this and cannot work out if the audio output tube should have a tube shield can anyone please advise

[Ron Ramirez]

Hi

No, the 42 audio output does not require a tube shield.

In the model 60, only the 6A7 det-osc tube, the 78 IF tube and the 75 2nd det tube used tube shields. And in later 1936 versions of the 60, the 6A7 did not use a shield.

The shields are very important, however, on the 78 and 75 tubes, The radio will squeal badly without them.

[d smith]

(03-22-2012 12:33 AM)Ron Ramirez Wrote:  Hi

No, the 42 audio output does not require a tube shield.

In the model 60, only the 6A7 det-osc tube, the 78 IF tube and the 75 2nd det tube used tube shields. And in later 1936 versions of the 60, the 6A7 did not use a shield.

The shields are very important, however, on the 78 and 75 tubes, The radio will squeal badly without them.

Hi Ron,
thanks for confirming this,
the reason I asked is because sometimes when the radio is playing there is an occassional popping noise, what might cause this?

[7estatdef]

Hi d and wellcome to the phoum
Let me ask you has the set been serviced within the last few years? Could be a number of things, but you've come to the right place to find out what the problem is.
Terry

[d smith]

(03-22-2012 01:06 AM)7estatdef Wrote:  Hi d and wellcome to the phoum
Let me ask you has the set been serviced within the last few years? Could be a number of things, but you've come to the right place to find out what the problem is.
Terry

Hi Terry,

Yes the radio has had a complete overhaul and been recapped. I think all are the original tubes except for the rectifier tube vhich is a new one. could it be possible that one or more of the old tubes may need replacing?

[TA Forbes]

It could also be different things affecting your electrical system. By this I mean your heat or air conditioning turning on and off, an electric oven, etc. Electric storms will cause loud static bursts on these old sets.

Circa 1930s electronics are more succeptable to "noise" on your electric service lines.

[d smith]

Hi,
I have currently got the chassis of the philco 60 grounded via a 3 wire lead through a 3 pin plug. is this the correct way to ground the chassis or should it be grounded via another means? and if so could you tell me how and if this would make any difference?
Thanks Dave

[tab10672]

(03-24-2012 08:01 PM)d smith Wrote:  Hi,
I have currently got the chassis of the philco 60 grounded via a 3 wire lead through a 3 pin plug. is this the correct way to ground the chassis or should it be grounded via another means? and if so could you tell me how and if this would make any difference?
Thanks Dave

Ground it to a seperate rod driven into the soil, the earth ground in the outlet will cause interferance noise from other appliances because the earth/green wire is tied to neutral/white in the breaker box.

[d smith]

(03-24-2012 10:18 PM)tab10672 Wrote:  

(03-24-2012 08:01 PM)d smith Wrote:  Hi,
I have currently got the chassis of the philco 60 grounded via a 3 wire lead through a 3 pin plug. is this the correct way to ground the chassis or should it be grounded via another means? and if so could you tell me how and if this would make any difference?
Thanks Dave

Ground it to a seperate rod driven into the soil, the earth ground in the outlet will cause interferance noise from other appliances because the earth/green wire is tied to neutral/white in the breaker box.

thanks...will give that a try! dave