Paragraphs 1-5 to 1-9
Model 492A and 494A are similar in that
one model may be changed to the other, by replacing
the twt, as covered in paragraph 5-17.
1-6. INSTRUMENT IDENTIFICATION.
1-7. Hewlett-Packard uses a two-section eight-digit
serial number (000-00000).
the first three digits
of the serial number on your instrument do not agree
WA •• ANTY CLAIM AND ADJUITMINT
with those on the title page of this manual, change
sheets supplied with the manual will define differences
between your instrument and the Model 492A or 494A
described in this manual.
1-8. TRAVELING WAVE TUBE WARRANTY.
1-9. The Traveling Wave Tube Warranty is illus-
trated in figure 1-2. A sheet for your use is included
in the appendix of this manual.
MICROWAVE TUBE WARRANTY CLAIM
Please ans....er all questions fully -- InsuHlclent Information may delay processing
of your claim. -
for microwave tubes supplied by [he
HEWLETT· PACKARD COMPANY
for use In
Microwave tubes supplied by the Hewlett-Packard Company. either 88 original or replacement.
instruments are actually warranted by the tube manufaclUrer and not by
will process warranty claims for you, and will promptly pass on all allowances
the tube manufacturer.
In the event that your tube Is (ound to
repairable, the tube manufacturer reserves the right
to repair and return the tube in lieu of Issuing pro--Tata credil.
For your convenience, warrantyclalms(orall microwave tubes supplied
Company may be made on this sIngle form; merely fJII out the lnfonnallon on the reverse side
and rerurn this fonn. along ....lth thedefectlve rube. to your
engineering representallve. or
Please be sure each space on the form is filled In··lack of complete infonnation may delay
Each tube manufacturer has his own warranty policy. Copies of Individual Conditions of War-
ranty are available from your
engineering representative or from Ihe He....len·Packard
Tube serial No.
Instrument serial no.
FOR FURTHER INFORMATION CONTACT:
Tube purchased from
On P. O. number
The following instructions are included to aid you In preventing damage in transit. Package
your tube carefully •• no allowance can be made on broken tubes.
Tube is Original (
) or Replacement (
Carefully wrap tube in
inch thick "klmpack". Cotton batting. or other sofl padding
Wrap the above in heavy kraft paper.
Pack in a rigid container ....hlch Is at least 4 inches larger than the lube In each dimension.
Surround the tube with at least 2 inches of shock absorbing material. Be cenaln that the
packing Is tight all around the tube.
Date tube received
Date first tested
Date placed in service
Date of failure
Hours use per day (average)
Number of days In service
Total hours filament operation
Tubes returned from outside the continental UnltedSrates should be packed In a wooden box.
Mark container FRAGILE and ship prepaid via Air Freight or Railway Expreu.
ship via Parcel POSt or AJr Parcel POSt since experience has shown that fragile Items are
more apt to be damaged when shipped by these means.
Tubes returned to the Hewlen·Packard Company should be addressed to:
SYMPTOMS: (Please describe conditions prior to and at time of failure. along with description
lube's defect, If known)
01 II. W....,..I.r.,.J
Were there other circuit component failures at time of failure? Which ones?
Figure 1-2. Traveling Wave Tube Warranty