Original caps for Phantom Deluxe

[Russ Webb]

Anybody have a picture of an original Phantom Deluxe (no FM) showing the underside of the power amp? Need spec/ part no. o the .05 caps to find original replacements to rebuild. Also spec, manufacture of the electrolytic cans. They might be the same as a Phantom but the power supply is not, so just to verify.

I could also use a photo of the receiver chassis in original condition.

[Russ Webb]

Norman, David, 

I have seen what you have David. And in this set a majority of the ST green stamped tubes are Sylvania. So I am going that way. Yes, I was probably thinking of MS sets when I mentioned Raytheon.

So for the MSM V and VI I think Raytheon is OEM. For the 1938, 39,  and 40 Scotts, Sylvania.

Norman, I should have been more specific, since you are probably right regarding sets pre 1937. I'll bet that a 2A3 was a high-priced part for which Scott might have looked the other way as to RCAs monopolistic tendencies.

FYI - On my inventory spreadsheet I track tube manufacture and later cap manufacture as well as metal, ST, globe, GT and label color for the 370 or so radios listed. Many manufactures are covered up till about 1942.

Russ

P.S. Receiver chassis is done, less alignment. I ended up short 4 ea. 279 caps and one .5 at 200V for which I have no example or part no. Moving on to the P.S./amp. I have settled on the cap can-type for which there was one remaining example - early twist lock style.

[David C. Poland]

Ah yes, the RCA flat plate 2A3's in the AW-23. Aware of those.

The three AW-23s I have had all had a variety of tube brands.

[Kent King]

I am just starting on a 1939 Philharmonic Deluxe remote control set and the vast majority of the tubes in it were Sylvania "green leaf" stamped. The pair of 6L7s in the expander were both Arcturus however, as were a couple other obvious replacements. I have filled the set out with the Sylvania tubes as I continue to work on it.

Kent

[Russ Webb]

Ta-da. Now for the PA.

The 2 Centralab, bass and treble controls aren't NOS, but really good quality.

[Kent King]

That looks great!! Excellent restoration!

Kent

[Russ Webb]

This version P.S. has a 6000 ohm bleeder on the 6L6 plate supply not found on earlier or later models. They must have gotten the voltage wrong or needed more current through the FC? 

Thanks, Kent.

[Russ Webb]

Here is a picture of a similar one on E-Pay:

https://www.ebay.ph/itm/285138277725?itmmeta=01J096R516WBHSYNPSABRT...

It is the ~20w brown ceramic coated WW near the filters. Same exact part as is in mine. Seems like a after thought. The previous owner of mine had placed one of those large spring loaded paper clips on it as a heatsink - an interesting way to address the heating.

When I get this running I will evaluate further.

Mine is marked "XX-235".

I am going to use the same style filter cans as are seen on that auction chassis.

[Russ Webb]

Almost ready to test.

It appears that the 6J5 tubes used in the amp/power supply might have been metal versions rather than ST. Pin 1 of those sockets is grounded as are the two 6L6G sockets.

[David C. Poland]

not uncommon for a factory  wire to allow metal replacements, but my experience pre war Scott provided glass tubes, except were a few metal in the FM circuit of the prewar models having the FM band feature, like the 28 tube FM Phantom and the 10 tube FM tuner.

[Kent King]

If I can find it - Scott wrote (in one of the Scott News issues) - about how he did not feel the metal tubes were any good. I very much doubt it came with metal tubes from the factory.

[Alex R. Whitaker]

I also remember reading that.  It was probably made so that a metal tube could be used as a replacement.  But, I'd bet $20 that it came with 6J5 G tubes. 

Kent King said:

If I can find it - Scott wrote (in one of the Scott News issues) - about how he did not feel the metal tubes were any good. I very much doubt it came with metal tubes from the factory.

[Russ Webb]

You all are probably right. My observation originally centered on the lack of shielding for this tube. The sockets in the receiver have pin 1 grounded as well (1940).

Also consider that McMurdo Silver, which was now a legacy for Scott, used metal tubes one year and not the next (1936 MSMV and 1937MSMVI) not that it meant anything in 1940.

Scott or any builder/engineer would have a good case against the original metal tubes (them with the "lump") since , the rectifier was junk, the 6F6 was probably getting too hot to last or work well, (good thing nobody ever stuffed a KT-88 in a metal shell).  The small signal tubes were less reliable for a few years. But later they were at least as good as the ST/GT tubes.

In 1937 RCA had sold the idea of metal tubes to Zenith. Following that year, pin 1 was not grounded. Could be Scott took a similar approach. but never removed the grounds.

Most manufactures hated RCA, for good reason. Philco produced sets who's shield did not allow the larger metal/octal base to fit. Another way to limit the use of metal tubes was to cut the grid (cap) leads too short to reach. Most of the grid leads, coming from the Scott IFs have been damaged, cut or spliced. Does anybody know if an original lead would reach the cap of a metal 6K7?

Over the years I have tried to acquire these early metal tubes with the lump and the embossed (stamped) tube type. The Raytheon versions (MSMV) are hard to find. As far as I know, a good rectified does not exist, but I have a few to display.

Russ

Moving on to the Garrard turntable circa 1950 - like the custom cabinet.