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In total, I have 63 of their ads saved that span a time from 1970 through
about 2000.

Paul, W9AC

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Jim Shorney
Sent: Wednesday, March 6, 2024 5:03 PM
To: [email protected]
Subject: Re: [DRAKE-RADIO] Drake L7 Power output


Thanks Paul. I've been meaning to look for some of those. My small Alpha is
a 76.

73

-Jim
NU0C

On Wed, 06 Mar 2024 13:23:38 -0800
"Paul Christensen" <w9ac@...> wrote:

Here are a few ETO/Alpha ads on my Google Drive with the legendary
brick on the key. Don't do this with today's solid-state amps.


?usp=s
haring

?usp=s
haring

?usp=s
haring

Paul, W9AC

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Jim
Shorney
Sent: Wednesday, March 6, 2024 12:30 PM
To: [email protected]
Subject: Re: [DRAKE-RADIO] Drake L7 Power output


Oh yeah. Looking at my 77Sx I believe it.

73

-Jim
NU0C

On Wed, 06 Mar 2024 09:11:01 -0800
"jerry-KF6VB" <jerry@...> wrote:

On 2024-03-06 08:47, Jim Shorney wrote:

I have a couple of Alphas that would do that but my antenna would
complain.

*** Remember the Alpha advertisement with the brick on the code key?

- Jerry, KF6VB

I remember these ads really well, and vaguely recall this (from one of the ads you posted)

Anyone recall how long it ran with the brick on the key?

John K5MO

I remember these ads really well, and vaguely recall this (from one of the ads you posted)

Anyone recall how long it ran with the brick on the key?
1
John K5MO

Thanks Jim and Paul,

That's impressive.? I wonder what finally gave up the ghost....rig or tube?

?

Great idea for an ad and getting 1600 entries meant people were paying attention.

John

Thanks Jim and Paul,

That's impressive.? I wonder what finally gave up the ghost....rig or tube?

Great idea for an ad and getting 1600 entries meant people were paying attention.

John

//////

I normally tune for about 500 watts on the meter, this is below of course the ratings for the tube noted by Drake in the manual. If I run AM phone with the amp using a modern rig I will have a carrier output of not more that 125 watts,

///////

73 and thanks again.

?

Tim

?

WB8UHZ

?

?

?

Tim,

You mentioned running AM with the L-4B and I thought I would share my experience running AM with my? C-Line.?? I think just about everyone here know that Drake used screen modulation with carrier control in the TR-3/4/6 transceivers and the T-4x A/B and maybe others.

It's interesting how really inefficient it is (using Drake tube transceivers and transmitters)? considering (IIRC) that they either screen modulated the driver (12BY7... TR-4/T-4X) or the final 12JB6's in the TR-3 etc.

So using an L-4B (or L-7) driving with a T-4X or TR-4 you could conceivably be running a screen modulated AM signal through 2 linear amplifiers (2 or 3 6JB6)? or just the 12JB6's in the TR-3

But it would appear that Drake intended the L-4/L-4B on AM to be operated using a Drake "driver" which would loosely approximate the average and peak power of driving with SSB.

And so I have actually used my T-4XB (that I bought new) to drive the L-4B on AM. (In the SSB MODE)

All tuned up, the "resting" carrier (controlled)? level is not quite 150W.?

Running the amp on 240 AC, It "talks" up to around 1400W PEP (output)? measured with both the? Array Solutions Power Master II and the peak reading watt-meter in the Palstar HF-Auto tuner.

I get signal reports similar to what the Viking 500 guys get in the Pacific NW

Driving it with any other NON-carrier controlled AM driver would require up to 375W of "resting" (or steady ) carrier to even come close to the above PEP

The 3-500's do also show some "color" when operating on AM.? I also tried a pair of 3-400's (that I have for my Loudenboomer) and they produced identical results.

Now having said all that, I never do "Lock-to-Talk" AM for 20min or even 10min like some of my "Verbose" friends do!? In fact, when I pause, I drop the carrier.?

But if I stop talking the power output still drops to a little less than 150W

I don't think anyone has ever told me that they could tell I was using Carrier Controlled AM unless I mentioned it.

And I actually would rather use my Viking Valiant anyway.?
Besides, 450W PEP with the Valiant and the 1300-1400W PEP running the C-Line / L-4B is only about a 5db difference and not really worth it.

73/Rick

True Rick the Drake gear used carrier control output in the AM mode ( no agc when using AM ) and the amp really? thinks its looking at an SSB signal. I've done this too with? good reports. And yes on the db difference you noted, at 100watts you have to get to 200 watts to just get 3db of signal difference on the receive end and to 400 watts to get an S-Unit.
73 Tim
WB8UHZ

On Friday, March 8, 2024 at 02:12:38 PM EST, Rick W4XA <myr748@...> wrote:

On Tue, Mar 5, 2024 at 11:21 AM, amfone wrote:

//////I normally tune for about 500 watts on the meter, this is below of course the ratings for the tube noted by Drake in the manual. If I run AM phone with the amp using a modern rig I will have a carrier output of not more that 125 watts,///////73 and thanks again.?Tim?WB8UHZ???

Tim,

You mentioned running AM with the L-4B and I thought I would share my experience running AM with my? C-Line.?? I think just about everyone here know that Drake used screen modulation with carrier control in the TR-3/4/6 transceivers and the T-4x A/B and maybe others.

It's interesting how really inefficient it is (using Drake tube transceivers and transmitters)? considering (IIRC) that they either screen modulated the driver (12BY7... TR-4/T-4X) or the final 12JB6's in the TR-3 etc.

So using an L-4B (or L-7) driving with a T-4X or TR-4 you could conceivably be running a screen modulated AM signal through 2 linear amplifiers (2 or 3 6JB6)? or just the 12JB6's in the TR-3

But it would appear that Drake intended the L-4/L-4B on AM to be operated using a Drake "driver" which would loosely approximate the average and peak power of driving with SSB.

And so I have actually used my T-4XB (that I bought new) to drive the L-4B on AM. (In the SSB MODE)

All tuned up, the "resting" carrier (controlled)? level is not quite 150W.?

Running the amp on 240 AC, It "talks" up to around 1400W PEP (output)? measured with both the? Array Solutions Power Master II and the peak reading watt-meter in the Palstar HF-Auto tuner.

I get signal reports similar to what the Viking 500 guys get in the Pacific NW

Driving it with any other NON-carrier controlled AM driver would require up to 375W of "resting" (or steady ) carrier to even come close to the above PEP

The 3-500's do also show some "color" when operating on AM.? I also tried a pair of 3-400's (that I have for my Loudenboomer) and they produced identical results.

Now having said all that, I never do "Lock-to-Talk" AM for 20min or even 10min like some of my "Verbose" friends do!? In fact, when I pause, I drop the carrier.?

But if I stop talking the power output still drops to a little less than 150W

I don't think anyone has ever told me that they could tell I was using Carrier Controlled AM unless I mentioned it.

And I actually would rather use my Viking Valiant anyway.?
Besides, 450W PEP with the Valiant and the 1300-1400W PEP running the C-Line / L-4B is only about a 5db difference and not really worth it.

73/Rick
W4XA
*Every post is created using Linux

True for casual operating but when chasing rare DX every dB counts! :D

73

-Jim
NU0C

On Fri, 08 Mar 2024 11:22:13 -0800
"amfone via groups.io" <amfone20000@...> wrote:

73/Rick