Hi michael, you've got a lot of  strange characters, = 2 0  , =20s, in your 
message.  Thought you'd like to know.  HTH, Danny.
----- Original Message ----- 
From: "Michael Ryan" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, November 10, 2009 2:36 PM
Subject: Heathkit SB-220 pwr out questions.


> =20
>
> =20
>
> Hi all:=20
>
> =20
>
> I've been running a Heathkit SB-220 HF amplifier for the past 5 months =
> and the overall output #s, aren't on par with a couple of other 220s =
> that are in operation in my area.=20
>
> My Amp is bone stock and original tubes. I don't know if the other amps =
> are because I don't know the operators personally., only one.=20
>
> The #s they claim are 100W in =3D 1KW CW, 100 in =3D 1800/2KW SSB.
>
> I use an LDG Electronics TW-1 meter.=20
>
>
>
> Here's my amplifier tune up procedure with my antenna tuned to a 1 to 1 =
> SWR.=20
>
> =20
>
> 1. Set  the Exciter drive at 10W, CW, on desired band.=20
>
> 2. Place the Amplifier in the CW/Tune position on same band.=20
>
> 3. Key the exciter and amplifier, adjust the tune control to increase =
> the pitch of my meter, about 10 seconds of key down, return to receive.=20
>
> 4. Key the exciter and amplifier,  adjust the load control to increase =
> the pitch of my meter further, about 10 seconds of key down, return to =
> receive.=20
>
> Key the exciter and amplifier to get a reading: 10W in =3D 170 out.=20
>
> 5. Place the amp in stand by and increase the exciter's drive to 100W.=20
>
> 6. Key the exciter and amplifier, adjust the load control, increasing =
> the pitch of my meter to its maximum, about 10 seconds of key down, =
> return to receive. =20
>
> Key the exciter and amplifier to get a reading: 100W in =3D 1030 out.=20
>
> 7. I switch the amp to SSB, leaving the exciter in CW, key the exciter =
> and amp to take a reading,=20
>
> 100W =3D 1237 out.=20
>
> As my meter requires a continuous carrier to function, this is why I =
> leave my exciter in CW and switch the amp to SSB for the final reading.=20
>
> I reduce the drive to 75W, with the exciter in CW and amp in SSB, I see =
> about 1KW out.=20
>
> LDG Electronics claim that there is about a 5 to 10 percent inaccuracy =
> on the measurements.=20
>
> Should I be concerned about these figures, are they normal, should I =
> consider replacing my power supply components and or tubes?=20
>
> =20
>
> Thanks & 73:=20
>
> =20
>
> Michael De VO1RYN=20