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]

It appears that Scott started using caps that had part nos. on them as well as switching from Sprague to smaller vendors like General cap for the 1940 model year. This unit has the tracking scale, but no FM.

A picture of the original underside of the 32 chassis might , at least, help in parts placement (replacement).

[Kent King]

I'll try to get some pics for you this evening - however, very few sets out there are "original", most saw service in the 50s/60s and beyond. Also, Scott did not use the same capacitors at all times, he sometimes switched manufacturers due to supply problems. Look in your set and see what is most common in the chassis (most likely Sprague). These can be replaced by new mylar units of the same capacitance. I generally purchase all 630V, they are so much smaller today, you can just use 630V caps for all of them (600/400/250). You will also find schematics and service data here on the site in the "Scott Info Archive" link above.

If you are seeking to do a "factory original" restoration, the Sprague caps can be warmed in a toaster oven and the sleeves saved. I put new caps inside and refill with beeswax. But I only do a restoration of this level for the rarest of sets. 

Kent

[Russ Webb]

Yep:

https://www.russoldradios.com/blog/77-chrome-plated-rivets

https://www.russoldradios.com/blog/scott-phantom

In this unit they are mostly NOT Sprague.

I was looking to collect any available information prior to starting.

Thanks

Russ

[Kent King]

Russ -

First off - for odd things like that coil, you didn't need to rewind it - I have over a dozen Phantom chassis available for parts, I can easily pull an original off one of these sets. This is true for any odd electrical part in the set. Those resistors are the B+ voltage divider. The Phantom sets used a Candohm resistor which is ALWAYS open on one or more segments. I usually put the correct resistor across the open terminals and leave the old unit in the set. Anyway, if you need parts off a Phantom for your restoration - please drop me a note at [e-mail]. I am sure I'll be able to help find what you need.

Kent

[Russ Webb]

Thanks.

Well, there are 2 .05 @ 400V caps in the power supply that I could use for a rebuild - it still has the 600V units. But, I am sure there will be more. I was particularly trying to ID the original versions of the electrolytic filters. I am sure that at least 2 of mine have been replaced.

This was a 1 family owned radio that was passed down. At one time it was owned by the first female US park ranger. She was stationed at Yellowstone or Yosemite - I have to look up which. Anyway, it had been installed in a very nice custom cabinet with a 1950 model TT, probably also the cabinet vintage. I guess that a relative worked at Stickley Furnisher at the time.

We had to drive up to Bend to pick it up.

Also, the chrome is a 9.5+. So, for once, I don't have to rechrome it (see 77 rivets).

[Russ Webb]

Here is the rebuilt candohm going back into the Phantom Deluxe.

[Russ Webb]

Here is a little more on the original paper cap part numbers as I rebuild the ones I have.

Theses are marked with a cap value, voltage and usually , a 3 digit number. And nothing else. They could have been made by Sprague. The ones that i was looking at were made by United, but, might not be original either. I have to restuff a number of # 279s and, at least 1 is missing so I will probably sub a Sprague cap of the same value/vintage until a cap with the correct part number is found. This will allow me to compare the innards side by side.

Still could use a pic of one of the original filter cans. I am adding part nos and voltage ratings to my schematic in Riders.  Were there any parts lists published for this radio or others around 1940?

[Norman S Braithwaite]

Russ, I have plenty of Scott OEM cardboard capacitor tubes.  I'm sure I have a 279.

[Russ Webb]

Thanks Norman.

I have only seen these in this Phantom Deluxe "revised" (but no FM). I looked at an 800 chassis - not there. There will probably be a few others missing, but it is going to take some research before I know which ones.

This chassis has had one leg lifted on ALL of them, but only a few were replaced. This makes ID harder since one thing I am good at is spotting non-factory solder joints.

After comparing a stock "279" to a similar vintage Sprague I found:

Paper tube size was the same

Construction materials were not identical

Construction of the foil/paper cap was different - originals did not end with tape.

Text font is different along with size

So, still, they might be Sprague but no proof yet.

Good news, after IDing the cap type, I found 3ea. 656s in my unidentified caps. This is probably the most common value @ .05uf 400V.

The filters may be the first Scott used that mounted on a wafer rather than stud-mount.

I've got about 30 caps to go on the receiver chassis.

[Russ Webb]

is there any consensus on which brand of tubes was generally OEM in Scotts produced up until 1940? I believe that they might have been Raytheon or Sylvania.

[David C. Poland]

Appears shift to Sylvania midway through AW-15 era (late 1934 or early 1935) after Scott ceased use of Arcturus Wunderlich tube in the AW-15. Finding numerous early "hot branded" Sylvania tubes thereafter. Have seen many original green print branded Sylvania tubes  in Philharmonic, Phantom etc in later 1930's chassis, a number of times nearly fully tubed with Sylvania brand.

McMurdo Silver used Raytheon, maybe another way to specifically differentiate from Scott?

I doubt Scott used RCA after 1930 RCA lawsuits of  companies manufacturing Superhets.

[Norman S Braithwaite]

RCA through the run of AW-23s.  The AW-15 and at least early AW-23s originally employed the RCA flat plate 2A3 tubes.  I don't recall ever seeing a hot stamp base Sylvania 2A3 in a Scott.  Possibly Arcturus for the AW-12s but really not sure.

Norman