[Boatanchors] 6146 question

[manualman at juno.com]

Registered the tube with who?

My information was taken directly from the documented/issued printed
specifications.

Pete, wa2cwa

On Sun, 28 Jan 2024 17:01:28 -0800 Richard Knoppow
<1oldlens1 at ix.netcom.com> writes:
>     Maybe the case. I don't think RCA registered the tube, I am 
> pretty 
> sure that was Sylvania. Tube designed for mobile use with improved 
> resistance to vibration. If RCA data shows the size to be the same 
> it 
> should be the same.
> 
> On 1/28/2024 4:19 PM, manualman at juno.com wrote:
> > There's NO difference in height/length with the 6146's that I can 
> find.
> > 
> > All tubes in the 6146 family are considered T12 bulbs.
> > 
> > Note: length equates to height.
> > 
> > RCA 6146A
> > 3 1/8 inches +/- 1/8 length
> > 
> > GE 6146A
> > 3.00 inches minimum length
> > 3.25 inches maximum length
> > 
> > RCA 6146B/8298A
> > 3 1/8 inches +/- 1/8 length
> > 
> > RCA 6146W/7212
> > 3 1/8 inches +/- 1/8 length
> > 
> > NOTE: These length dimensions don't consider the length of the 
> pins but
> > since the pins go into a socket, who cares.
> > NOTE: All the above tubes have the same diameter 1 21/32 inches
> > 
> > In all of these tubes, there are some minor inter electrode 
> capacitance
> > differences between some models but I never found it to be a 
> problem in
> > rigs from HF to 50 MHz. The consideration with any of these tubes 
> is
> > PLATE DISSIPATION and whether the power supply in the equipment 
> can
> > handle a sub to the 6146B's. The 6146B/8298A (and the Japanese 
> S2001A)
> > are rated for 35 watts plate dissipation whereas the earlier 6146 
> family
> > and the 6146W are rated for approximately 25 to 27 watts plate
> > dissipation.
> > 
> > Over the years I used 6146B's in my Heathkit Apache, HW-101, 
> SB-101,
> > SB-102, Valiant, Ranger, Hallicrafters HT-32's, B&W 5100B, and 
> several
> > Kenwood rigs and all worked very well with these tubes.
> > 
> > Obviously, at higher operating frequencies with this family of 
> tubes,
> > inter electrode capacitance, wire dressing, wire positioning and 
> over all
> > design can play an important part in problem less operation of your 
> RF
> > amplifier.
> > 
> > Pete, wa2cwa
> > 
> > 
> > On Sun, 28 Jan 2024 13:09:27 -0800 Richard Knoppow
> > <1oldlens1 at ix.netcom.com> writes:
> >>      Not if the 6146B is too tall. The B really is a similar but
> >> different tube. This may be of no significance for the Ranger.
> >>
> >> Richard Knoppow
> >> Los Angeles
> >> WB6KBL