SB 301-AMdet mod

[Ray Friess]

you had same problem?

Stu Lyon wrote:

>Manuel,
>I have posted the 1/6/69 Heathkit mod to the SB-301 AM detector at the
>following:
>(right click to download)
>http://home.earthlink.net/~w6cux/images/sb301mod/sb301-1-mod.bmp
>http://home.earthlink.net/~w6cux/images/sb301mod/sb301-2-mod.bmp
>http://home.earthlink.net/~w6cux/images/sb301mod/sb301-3-mod.bmp
>
>The files are NOT compressed so they are big (275K)
>
>This modification consists of adding a 470K across the AM diode detector.
>
>73, Stu W6CUX
>Winnetka, CA
>w6cux at earthlink.net
>
>----- Original Message -----
>From: "Manuel Monteserin Garcia" <mmonteserin at YA.COM>
>To: <HEATH at LISTSERV.TEMPE.GOV>
>Sent: Monday, October 11, 2004 4:26 AM
>Subject: SB 301 LMO tubes
>
>
>
>
>>Hello , good morning.
>>I've read in Heathkit's mail list, your comments from Stu (W6CUX) about
>>SB-301:
>>    "However, there was a 3-page modification letter dated 1-6-69 which
>>added a
>>   470K load to the AM detector. The partial schematic relating to that
>>
>>
>mod
>
>
>>   shows the LMO as having a 6CB6. Since both tubes have the same base
>>(7CM), I
>>   would replace whatever is in there with the same type to maintain the
>>   calibration."
>>I'm a SB-301 owner from long time ago and, if it's possible,  would have
>>these 3 pages
>>letter...Please, could you send a copy to me...?.  (I'll be glad of pay
>>shipment.) Or e-mail
>>a scanned letter.
>>Thanks in advance for your time and attention.
>>With my best wishes from Madrid,
>>Manuel Monteserin
>>
>>
>
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