SB-401 Parts AM filter question?

[Stephen C. Finch]

Fred,

AM filter:

Under normal circumstances, a 3.75 kHz filer would be somewhat narrow.
However, that filter has a relatively wide skirt and therefore does not
cut-off the signal very quickly.  I had the filer in my SB-303 and it did
just fine.  Besides, the typical spacing for shortwave broadcasts is 5 kHz
so the 3.75 should "do the trick."

By the way, I have a 6 kHz in my FT-100D and it is too wide.  A 4.5 kHz
would have been better as that filter has relatively steep cut-offs.

Steve 
AIØW

-----Original Message-----
From: Heathkit Owners and Collectors List [mailto:HEATH at LISTSERV.TEMPE.GOV]
On Behalf Of FRED HOLNAGEL
Sent: Monday, June 21, 2004 2:49 PM
To: HEATH at LISTSERV.TEMPE.GOV
Subject: SB-401 Parts AM filter question?

.  For sale excellant panel for the 401 with plastic escutsion plate with
"Heathkit" and "SB- 401" emblems sharp and unscratched. All silk screen ing
sharp and unworn. $20.00
Panel meter, clear face. $12.50
Power xfmr. $15.00
Set of tube pulls minus the finals and one small tube $10.00        
Other parts, what do you need?

All above plus shipping from 98661

Question:  I have what i think is the AM filter for an SB-303 receiver
marked 3.75 khz. (Seems narrow?)  On one side is stamped 2171. Part number
is 404-M285P364.  The 2171 has me stymied. (Kit part #?)  Thanks!

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=ATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://interactive.tempe.gov/archives/HEATH.html

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://interactive.tempe.gov/archives/HEATH.html