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2-B Lights
Because the factory lighting for the 2-B's dial leaves a bit to be desired - particularly in the center portions of the dial, I tried something a little different and mounted a few SMD LEDs and
By n4buq · #71061 ·
TR7 Filters and Knobs
So today a care package arrived from Noble Radio. A 450Hz CW filter. A true work of art. I did not delay in installing it. Had to do some cleanup on the filter card; somebody had done a messy remove
By jerry-KF6VB · #71060 ·
Re: 2-A S-Meter Reading
4 Line. The 2¡¯s are not the same. Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from Proton Mail for iOS
By Steve Wedge, W1ES/4 · #71059 ·
Re: 2-A S-Meter Reading
A little low S-9 on a Drake should be 30 uV.Sent from my Galaxy
By Richard Knoppow · #71058 ·
Re: 2-A S-Meter Reading
I am fairly sure that during the 2 series, S9 is 50 uV. The others here will correct me if I¡¯m wrong. I can¡¯t remember if the 2-A had any paper capacitors (the 2-B has film capacitors that look
By Steve Wedge, W1ES/4 · #71057 ·
2-A S-Meter Reading
I have a very clean (for a 60 year old radio) 2-A that I'm checking out for selling. It has been my bench receiver for years and seems to work fine.? All voltages check out fine.? for a 50 uV signal
By Clark WU4B · #71056 ·
Re: Using a resistor with 6BN8 filament
Bill, You are absolutely right!?? I screwed up! (That never happens does it?) I see what I did now!!? Late last night I had both schematics on my desktop....? the 2-B? was a DJVU file and the 2-A
By Rick WA6III <myr748@...> · #71055 ·
Re: Using a resistor with 6BN8 filament
My 2B is s/n 2974 and it uses an 8BN8. May 1961 is printed on the S-meter rear cover. Food for thought: if all of the filaments were floating, instead of being grounded on one side, would this
By ve3fit@... · #71054 ·
Re: Using a resistor with 6BN8 filament
Rick Check it out Bill WB2UFC
By william stevens · #71053 ·
Re: Using a resistor with 6BN8 filament
Rick The 8bn8 is used for 3 things bias rect,noise Lim, audio amp see attached
By william stevens · #71052 ·
Re: Using a resistor with 6BN8 filament
Rick My 2 B is SN. 9200 and it uses 8BN8¡¯s BILL
By william stevens · #71051 ·
Re: Using a resistor with 6BN8 filament
Indeed! I have bought several tubes from them!? They have so much "good stuff" that even if I want only 1 tube I usually get 2 or 3 and I always need other tubes and stuff too! I am a little late to
By Rick WA6III <myr748@...> · #71050 ·
Re: Using a resistor with 6BN8 filament
Folks Surplus sales of Nebraska has 8BN8¡¯s for $ 2.50 but he requires a min buy on most of his stock and they could be very old stock Bill WB2UFC
By william stevens · #71049 ·
Re: TR7 Screws
"jerry-KF6VB" <jerry@...> wrote: They are 4-40. I've seen both slotted and Phillips used depending on the age of the gear. Could be round or pan head I suppose, I never gave it much thought. Use
By Jim Shorney · #71048 ·
Re: Using a resistor with 6BN8 filament
I have a Kenwood TS-820S that received fine but would not transmit. The AGC voltage was way off. I looked at it on and off for months, hobbled by the fact that Kenwood did not provide a table of
By Graham Hunter · #71047 ·
Re: TR7 Screws
Cabinet screws are flat heads.
By James Barrie · #71046 ·
R-4C wire with no end stop
On the back of the print on the MODE/FILTER switch in my R-4C there is a 3 cm wire with no end stop. It is soldered onto the shield of the coax cable, and the solder looks original. Any idea what it
By Peter Ravn · #71045 ·
Re: Using a resistor with 6BN8 filament
Like Dan mentioned, thanks for posting your work Steve (and others). It's great to learn from your experiences. John K5MO
By John K5MO · #71044 ·
Re: enhancing the speaker in the Ac-4 power supply?
As others note, the speaker, the enclosure, and the audio amp you have there are all compromises.? Add in age, and possible slight misalignment of your receiver (which can make audio less clear), and
By Eric Daniels · #71043 ·
Re: Using a resistor with 6BN8 filament
Lesson learnt. I was trying to quickly find one and you see what that got me. Carry on¡­ Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from Proton Mail for iOS
By Steve Wedge, W1ES/4 · #71042 ·