The PHILCO Phorum
A Philco story for the Phorum - Printable Version

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+--- Thread: A Philco story for the Phorum (/showthread.php?tid=19651)


A Philco story for the Phorum - DavidHTO - 02-11-2019

I figure this would be the place to post this story I wrote for my company's Engineer Zone forum on changes to the Philco 46-250 and how they represent the improving "state of the art" in radio design...

https://ez.analog.com/b/engineering-mind/posts/philco-radio-and-the-changing-of-state-of-the-art-technology


David

RE: A Philco story for the Phorum - klondike98 - 02-11-2019

Thanks for posting that!

RE: A Philco story for the Phorum - mikethedruid - 02-11-2019

Loctal vs octal. They may have been marketed as "pin for pin compatible," but that actually meant you could replace the octal socket with a loctal socket easily, or buy an adapter. the loctal tubes never were meant to actually work directly in octal sockets, any fool who ever tried it found out immediately that it didn't work. As time went on, by the 1960s, loctal tubes were becoming difficult to find. I know this because I was already collecting antique radios by then, and didn't bother with the later Philcos at the time because they used loctals, or any other radio that used them. RCA and Crosley never seem to have made this mistake.

RE: A Philco story for the Phorum - morzh - 02-11-2019

I would say Octals outlived Loctals.
At least the beam tetrodes made it all the way to our days with the production in the USSR having ceased only in 90s. And then resuming some time in 21st century. Loctals remain dead.

RE: A Philco story for the Phorum - DavidHTO - 02-11-2019

You're welcome.  Just visited your restoration page, was very impressed.

I was about to start on a Philco 46-1226 Code 125 radio/turntable but am looking first for a source of the three notes that update the Code 122 schematic (which I have) for the Code 125.  The Phun never stops with Philcos... ;)

RE: A Philco story for the Phorum - jcassity - 02-11-2019

at the philco repair bench his name is chuck schwark ,, i think he hails from IL,, at least thats what my envelope says for when he mailed me the prints you need.

like i said on the other thread,, i can help, just call or whatever or piddle around here or search out chuck's user name... i dont know it.
I am not certain the philco repair bench is still up or not for getting prints.

someone else will chime in i am sure.

RE: A Philco story for the Phorum - Ron Ramirez - 02-11-2019

Chuck Schwark is his name and schematic copies is his game. Icon_smile And his schematic copies are the best. Icon_thumbup

He is enjoying a well-deserved retirement, but he is still offering his schematic copy service.

https://www.philcorepairbench.com/schematics/

RE: A Philco story for the Phorum - Paul Philco322 - 02-11-2019

I think I met you David at the last NEARC meet Brookline NH. Hope to see you in Nashua in March. I got one of those 46 250s from a fellow who just wanted someone who would repair it and enjoy it to be the owner. One of my best deals ever, i paid the 8 dollars shipping from NH!

I enjoyed reading your story and yes watch the Hot Chassis. 

Paul

RE: A Philco story for the Phorum - jake wells - 05-16-2019

i hate loctals with a passion every set i had with them have been nothing but trouble.

RE: A Philco story for the Phorum - morzh - 05-17-2019

I don't hate them, but the fact that I have to scrape every pin with a scalpel before testing and re-inserting the tube does make me prefer other types.

RE: A Philco story for the Phorum - rdnzl - 05-17-2019

Why do you need to scrape them?

RE: A Philco story for the Phorum - morzh - 05-17-2019

They oxydize black and dont make contact.