Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
Open Roads Radio forum for Ham, Amateur Radio and RV camping


Reply
 
Thread Tools Display Modes
 
Old 07-01-2010, 06:41 PM   #1
Radio
Administrator
 
Radio's Avatar
 
Join Date: Nov 2007
Location: Fayetteville, GA, USA
Posts: 3,017
Default Radio's "radio trivia"

I'll ask the questions. When the question is answered I'll ask another. (No Googling)

If you open a TO-5 package, what would you find inside?
__________________

KU4OJ "Wade" Ships Captain, CFO, Chief Engineer
KG4DQQ "Kathy" 1st Officer, Navigator, Best Friend
2007 F-150 SuperCab - 2009 Rockwood 8280SS
Lot's of mostly Kenwood stuff

Radio is offline   Reply With Quote
Old 07-01-2010, 07:53 PM   #2
Andy N1ORK
Senior Member
 
Andy N1ORK's Avatar
 
Join Date: Jan 2008
Location: Manchester, CT
Posts: 1,034
Send a message via Yahoo to Andy N1ORK Send a message via Skype™ to Andy N1ORK
Default

TO-5? plastic pakaging for a semiconductor of some sort?



__________________
CQ..CQ..CQ..DE ANDY, N1ORK..QTH Manchester, CT...QRZ..QRZ..
Hello anyone out there?
Is this thing on?
SkyWarn, CERT, EmComm
Andy N1ORK is offline   Reply With Quote
Old 07-01-2010, 08:04 PM   #3
Radio
Administrator
 
Radio's Avatar
 
Join Date: Nov 2007
Location: Fayetteville, GA, USA
Posts: 3,017
Default

Close.
__________________

KU4OJ "Wade" Ships Captain, CFO, Chief Engineer
KG4DQQ "Kathy" 1st Officer, Navigator, Best Friend
2007 F-150 SuperCab - 2009 Rockwood 8280SS
Lot's of mostly Kenwood stuff

Radio is offline   Reply With Quote
Old 07-02-2010, 12:18 AM   #4
KC1BUD
Senior Member
 
Join Date: Jun 2008
Location: Gateway to the thumb
Posts: 243
Default

TO5 isn't that the transistor? Three leads and one junction.

It has been too many years for sure.
__________________
Dan,
Almost a Marine (Army/Navy)
15 months in VietNam (12 Army/3 Navy)
Love to
KC1BUD is offline   Reply With Quote
Old 07-02-2010, 08:19 AM   #5
TXiceman
Senior Member
 
TXiceman's Avatar
 
Join Date: Nov 2007
Location: Near Houston, TX
Posts: 553
Default

Small 3 pin transistor with Collector, Emitter and Base Leads.
__________________
KE5DFR
2013 HitchHiker Champagne 38RLRSB, 2012 F350 Dually crew cab, 6.7L,
Mobile- Yaesu FT857D w/ Lil' Tarheel II antenna and Larsen dual bander, Turbo Tuner.
Base unit...Kenwood TS480HX, LDG AT200 Pro tuner, Eagle One Vertical and Windom 80 meter dipole.
Standard Schnauzer..her call is K9WOOF
TXiceman is offline   Reply With Quote
Old 07-02-2010, 10:03 AM   #6
Radio
Administrator
 
Radio's Avatar
 
Join Date: Nov 2007
Location: Fayetteville, GA, USA
Posts: 3,017
Default

Here's a TO-5 package. Inside you would find a transistor. Or maybe a voltage regulator or op-amp. It is interesting to note TO-5 refers only to the can, and not the number of legs.
Attached Images
File Type: jpeg to-5.jpeg (1.2 KB, 35 views)
__________________

KU4OJ "Wade" Ships Captain, CFO, Chief Engineer
KG4DQQ "Kathy" 1st Officer, Navigator, Best Friend
2007 F-150 SuperCab - 2009 Rockwood 8280SS
Lot's of mostly Kenwood stuff

Radio is offline   Reply With Quote
Old 07-02-2010, 10:16 AM   #7
Radio
Administrator
 
Radio's Avatar
 
Join Date: Nov 2007
Location: Fayetteville, GA, USA
Posts: 3,017
Default

Next question: In this vintage 1950's AM radio, you would find 5 tubes.

A. Without looking, how many of them can you name?
B. These five tubes were selected/designed to save cost in radio manufacturing. What was the technical advantage they provided?
Attached Images
File Type: jpeg 5tube.jpeg (2.2 KB, 35 views)
__________________

KU4OJ "Wade" Ships Captain, CFO, Chief Engineer
KG4DQQ "Kathy" 1st Officer, Navigator, Best Friend
2007 F-150 SuperCab - 2009 Rockwood 8280SS
Lot's of mostly Kenwood stuff

Radio is offline   Reply With Quote
Old 07-02-2010, 02:15 PM   #8
W9WLS
Senior Blame Catcher
 
W9WLS's Avatar
 
Join Date: May 2010
Location: Oakland City Ind.
Posts: 265
Send a message via Yahoo to W9WLS
Default

TO-5 , Two Japanese midgets with 3 jumpers and one grain of rice.
__________________
DE: John W9WLS
W9WLS is offline   Reply With Quote
Old 07-02-2010, 07:08 PM   #9
WD8QBQ
Senior Member
 
Join Date: Nov 2009
Posts: 279
Red face

Guessing, 6al6 and 12au7, for two

JIM
WD8QBQ is offline   Reply With Quote
Old 07-02-2010, 07:22 PM   #10
Andy N1ORK
Senior Member
 
Andy N1ORK's Avatar
 
Join Date: Jan 2008
Location: Manchester, CT
Posts: 1,034
Send a message via Yahoo to Andy N1ORK Send a message via Skype™ to Andy N1ORK
Default

The filaments in the tubes were wired in series so you wouldn't need a transformer for the power supply and the plate voltages could all run on 115vdc. Usually 1/2 wave rectification and cap filtering. You just had to be careful that the polarity of the AC plug was correct if you were going to work on it. The radio, however, worked either way. Not sure of the tube compliment, but I think one was a 12at... something.



__________________
CQ..CQ..CQ..DE ANDY, N1ORK..QTH Manchester, CT...QRZ..QRZ..
Hello anyone out there?
Is this thing on?
SkyWarn, CERT, EmComm
Andy N1ORK is offline   Reply With Quote
Old 07-03-2010, 06:27 AM   #11
Radio
Administrator
 
Radio's Avatar
 
Join Date: Nov 2007
Location: Fayetteville, GA, USA
Posts: 3,017
Default

Quote:
Originally Posted by Andy N1ORK View Post
The filaments in the tubes were wired in series so you wouldn't need a transformer for the power supply and the plate voltages could all run on 115vdc.
Correct!

Now, how many of the five tubes can we remember.

There were several variants over about 30 years. Any tube from any variant counted OK.
__________________

KU4OJ "Wade" Ships Captain, CFO, Chief Engineer
KG4DQQ "Kathy" 1st Officer, Navigator, Best Friend
2007 F-150 SuperCab - 2009 Rockwood 8280SS
Lot's of mostly Kenwood stuff

Radio is offline   Reply With Quote
Old 07-04-2010, 06:23 AM   #12
Andy N1ORK
Senior Member
 
Andy N1ORK's Avatar
 
Join Date: Jan 2008
Location: Manchester, CT
Posts: 1,034
Send a message via Yahoo to Andy N1ORK Send a message via Skype™ to Andy N1ORK
Default

Hmmm..., let's see............ 117vac / 5 tubes averages out to about 23.4 filament volts per tube. I don't recall if any of the tubes had 24v filaments, Hmmmm...........
Have to check out the old set I have in a wooden case when I get home.



__________________
CQ..CQ..CQ..DE ANDY, N1ORK..QTH Manchester, CT...QRZ..QRZ..
Hello anyone out there?
Is this thing on?
SkyWarn, CERT, EmComm
Andy N1ORK is offline   Reply With Quote
Old 07-04-2010, 06:41 PM   #13
Radio
Administrator
 
Radio's Avatar
 
Join Date: Nov 2007
Location: Fayetteville, GA, USA
Posts: 3,017
Default

Quote:
Originally Posted by Andy N1ORK View Post
Hmmm..., let's see............ 117vac / 5 tubes averages out to about 23.4 filament volts per tube. I don't recall if any of the tubes had 24v filaments, Hmmmm...........
Have to check out the old set I have in a wooden case when I get home.
Hint: The filament voltages all added up to 121 volts. But they were not all equally divided 12 + 12 + 12 + 50 + 34 = 121.
__________________

KU4OJ "Wade" Ships Captain, CFO, Chief Engineer
KG4DQQ "Kathy" 1st Officer, Navigator, Best Friend
2007 F-150 SuperCab - 2009 Rockwood 8280SS
Lot's of mostly Kenwood stuff

Radio is offline   Reply With Quote
Old 07-08-2010, 08:37 AM   #14
Andy N1ORK
Senior Member
 
Andy N1ORK's Avatar
 
Join Date: Jan 2008
Location: Manchester, CT
Posts: 1,034
Send a message via Yahoo to Andy N1ORK Send a message via Skype™ to Andy N1ORK
Default

OK, enough of a chance..............here goes:
50b5,12ba6,12at6,12be6,35w4
at least in the one I have.
73



__________________
CQ..CQ..CQ..DE ANDY, N1ORK..QTH Manchester, CT...QRZ..QRZ..
Hello anyone out there?
Is this thing on?
SkyWarn, CERT, EmComm
Andy N1ORK is offline   Reply With Quote
Old 07-10-2010, 11:03 AM   #15
Radio
Administrator
 
Radio's Avatar
 
Join Date: Nov 2007
Location: Fayetteville, GA, USA
Posts: 3,017
Default

I said you couldn't Google. Never said you couldn't look in a radio!!

Here's the answer. Well, here is one of several variants. As you can see there is no heavy expensive power transformer. And it will run on AC or DC if you can find 115v of battery!

Many of these were repaired "while you wait" as the tech simply swapped tubes until it worked. Sometimes you could tell if a tube was "gassy" because it lit up purple. Some were intermittent and a tap with a pencil eraser would indicate that. But if you lost a filament then you could either swap tubes until you found it, or really impress your customer by locating the open filament with a meter, and fixing the little radio on the first try.
Attached Images
File Type: jpg 5tubeRadio.jpg (59.5 KB, 33 views)
__________________

KU4OJ "Wade" Ships Captain, CFO, Chief Engineer
KG4DQQ "Kathy" 1st Officer, Navigator, Best Friend
2007 F-150 SuperCab - 2009 Rockwood 8280SS
Lot's of mostly Kenwood stuff

Radio is offline   Reply With Quote
Old 07-10-2010, 11:27 AM   #16
Radio
Administrator
 
Radio's Avatar
 
Join Date: Nov 2007
Location: Fayetteville, GA, USA
Posts: 3,017
Default New Question

You have a shoebox full of these at the hamfest bone yard for $1 each, new in box. Junior Wannabee gives you $2, says he's rebuilding the Class B final amp in his Grandpa's old Blitzensparker DX50.

What do you do?
Attached Images
File Type: jpg aaa0504.jpg (26.1 KB, 33 views)
__________________

KU4OJ "Wade" Ships Captain, CFO, Chief Engineer
KG4DQQ "Kathy" 1st Officer, Navigator, Best Friend
2007 F-150 SuperCab - 2009 Rockwood 8280SS
Lot's of mostly Kenwood stuff

Radio is offline   Reply With Quote
Old 07-13-2010, 01:00 PM   #17
Radio
Administrator
 
Radio's Avatar
 
Join Date: Nov 2007
Location: Fayetteville, GA, USA
Posts: 3,017
Default

I guess I stumped them?
__________________

KU4OJ "Wade" Ships Captain, CFO, Chief Engineer
KG4DQQ "Kathy" 1st Officer, Navigator, Best Friend
2007 F-150 SuperCab - 2009 Rockwood 8280SS
Lot's of mostly Kenwood stuff

Radio is offline   Reply With Quote
Old 07-14-2010, 06:13 AM   #18
Andy N1ORK
Senior Member
 
Andy N1ORK's Avatar
 
Join Date: Jan 2008
Location: Manchester, CT
Posts: 1,034
Send a message via Yahoo to Andy N1ORK Send a message via Skype™ to Andy N1ORK
Default

I guess you did Wade. Based on the number, there are 4 elemnts (5u4) and a 5v filament, so I guessed it was a rectifier and not much use as a class B amp tube. Didn't know the price value of the tube, but I'm guessing it's more than $2. I'm gonna google it just to find out, but I won't post it here.
73
P.S.
I believe the filament is also the cathode for the 2 plates, ergo it is a full wave rectifier.



__________________
CQ..CQ..CQ..DE ANDY, N1ORK..QTH Manchester, CT...QRZ..QRZ..
Hello anyone out there?
Is this thing on?
SkyWarn, CERT, EmComm
Andy N1ORK is offline   Reply With Quote
Old 09-11-2010, 11:59 AM   #19
aintgotnun
Admin. I guess..........
 
aintgotnun's Avatar
 
Join Date: Nov 2007
Location: Justin, Texas
Posts: 333
Default

Quote:
Originally Posted by Radio View Post
You have a shoebox full of these at the hamfest bone yard for $1 each, new in box. Junior Wannabee gives you $2, says he's rebuilding the Class B final amp in his Grandpa's old Blitzensparker DX50.

What do you do?

Ah but the question is "What do you do?"...

Since you had them for a buck each and he gives you 2 bucks you give him 2 tubes right?


yeah I'm reachin
__________________
My name is Greg and I aintgotnun.

A radio that is.


End jihad
aintgotnun is offline   Reply With Quote
Old 09-11-2010, 09:41 PM   #20
Radio
Administrator
 
Radio's Avatar
 
Join Date: Nov 2007
Location: Fayetteville, GA, USA
Posts: 3,017
Default

After taking Juniors $2, you inform him these are rectifier tubes, not RF power amplifier tubes. If Junior has looked at the Blitzensparker DX50 schematic (or even looked inside the thing) he should know if 5U4's are on his lists of tubes to buy.
__________________

KU4OJ "Wade" Ships Captain, CFO, Chief Engineer
KG4DQQ "Kathy" 1st Officer, Navigator, Best Friend
2007 F-150 SuperCab - 2009 Rockwood 8280SS
Lot's of mostly Kenwood stuff

Radio is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 06:27 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
×