[AMPS] Survey #1 - The Ultiamate Amplifier
Steve Cook
scook@azstarnet.com
Fri, 31 Dec 1999 14:58:42 -0700
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Dear AMPS reflector participant,
I am conducting the following survey in conjunction with my final thesis =
project. If you have a few minutes to kill, I would be interested in =
your input to the following questionnaire.
Although many of the questions or open-ended, please be specific to your =
preferences.
At the conclusion of this project, I would be happy to share the results =
with the group, or anyone expressing an interest in the subject matter.
Please e:Mail me direct at scook@azstarnet.com
This will keep from clogging up the reflector with my "homework".
Thanks in advance=85
Steve Cook (WB6IFG)
----------------------------------------------- START SURVEY =
---------------------------------------------
Current Products
1.. What are your biggest complaints with the linear amplifiers =
currently on the market?
2.. Which commercially built linear amplifier, do your prefer, and =
why?
Mechanical
1.. Do you prefer table-top or floor models?
2.. How much should a "quality" linear amplifier weigh?
3.. Are esthetics important -- what are your pet peeves?
4.. Do you prefer analog meters, or some sort of LED or digital =
display?
5.. What type of cooling do you prefer -- fan, blower, other?
6.. Is cooling noise an issue?
7.. What is the right size for a linear amplifier (L-W-H)?
8.. Which amplifier in history seemed to have it all together=85 =
function, finish, size, control placement, quality, feel, esthetic, =
performance, etc.?
Electrical=20
1.. What tube(s) would you choose and why?
2.. What circuit configuration (g-g, grid-driven, etc.) do you =
prefer, and why?
3.. Do you prefer full manual control, or microprocessor controlled =
amplifiers?
4.. Is "step-start" an important feature?
5.. Should provisions for the adjustment of filament voltage be =
included in new designs?
6.. Should provisions for the adjustment of idling plate current be =
included in new designs?
7.. What sort of HV power supply do you prefer; e.g., doubler, FWB, =
capacitive or inductive input.
8.. How much HV plate supply filter capacitance is "about right"?
9.. Should the plate supply filter cap(s) be oil filled, or computer =
grade type?
10.. Do you prefer vacuum relays, PIN switch or open frame?
11.. What degree of voltage regulation do you recommend for the:
a.. HV --
b.. Screen --
c.. Bias --
d.. Filaments --
Performance
1.. How much output power should a "legal limit" linear amplifier be =
"capable" of producing?
2.. Duty cycle?
3.. Performance margin?
4.. How much IMD is acceptable?
5.. How do you define "performance" in terms of a linear amplifier?
Features
1.. What are some of the features you would like to see on future =
linear amplifiers?
2.. In a paragraph or so, describe the ultimate legal-limit linear =
amplifier -- one that, if actually produced by a manufacturer, would =
really get your interest.
Cost
1.. What is a reasonable price range for your "dream amplifier"?
2.. What is a reasonable warranty term and what should be covered?
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<DIV><FONT face=3DArial><FONT face=3DArial>
<P>Dear AMPS reflector participant,</P>
<P>I am conducting the following survey in conjunction with my final =
thesis=20
project. If you have a few minutes to kill, I would be interested in =
your input=20
to the following questionnaire.</P>
<P>Although many of the questions or open-ended, please be specific to=20
<I>your</I> preferences.</P>
<P>At the conclusion of this project, I would be happy to share the =
results with=20
the group, or anyone expressing an interest in the subject matter.</P>
<P>Please e:Mail me direct at </FONT><A =
href=3D"mailto:scook@azstarnet.com"><FONT=20
face=3DArial>scook@azstarnet.com</FONT></A></P><FONT face=3DArial>
<P>This will keep from clogging up the reflector with my=20
"homework".</P>
<P>Thanks in advance…</P>
<P>Steve Cook (WB6IFG)</P>
<P>----------------------------------------------- START SURVEY=20
---------------------------------------------</P><B>
<P>Current Products</P></B>
<OL>
<LI>What are your biggest complaints with the linear amplifiers =
currently on=20
the market?</LI>
<LI>Which commercially built linear amplifier, do your prefer, and=20
why?</LI></OL><B>
<P>Mechanical</P>
<OL></B>
<LI>Do you prefer table-top or floor models?</LI>
<LI>How much should a "quality" linear amplifier =
weigh?</LI>
<LI>Are esthetics important -- what are your pet peeves?</LI>
<LI>Do you prefer analog meters, or some sort of LED or digital=20
display?</LI>
<LI>What type of cooling do you prefer -- fan, blower, other?</LI>
<LI>Is cooling noise an issue?</LI>
<LI>What is the right size for a linear amplifier (L-W-H)?</LI>
<LI>Which amplifier in history seemed to have it all =
together…=20
function, finish, size, control placement, quality, feel, esthetic,=20
performance, etc.?</LI></OL><B>
<P>Electrical </P>
<OL></B>
<LI>What tube(s) would you choose and why?</LI>
<LI>What circuit configuration (g-g, grid-driven, etc.) do you =
prefer, and=20
why?</LI>
<LI>Do you prefer full manual control, or microprocessor controlled=20
amplifiers?</LI>
<LI>Is "step-start" an important feature?</LI>
<LI>Should provisions for the adjustment of filament voltage be =
included in=20
new designs?</LI>
<LI>Should provisions for the adjustment of idling plate current be =
included=20
in new designs?</LI>
<LI>What sort of HV power supply do you prefer; e.g., doubler, FWB,=20
capacitive or inductive input.</LI>
<LI>How much HV plate supply filter capacitance is "about=20
right"?</LI>
<LI>Should the plate supply filter cap(s) be oil filled, or computer =
grade=20
type?</LI>
<LI>Do you prefer vacuum relays, PIN switch or open frame?</LI>
<LI>What degree of voltage regulation do you recommend for =
the:</LI></OL>
<BLOCKQUOTE>
<UL>
<LI>HV --</LI>
<LI>Screen --</LI>
<LI>Bias --</LI>
<LI>Filaments --</LI></UL></BLOCKQUOTE><B>
<P>Performance</P></B>
<OL>
<LI>How much output power should a "legal limit" linear =
amplifier=20
be "capable" of producing?</LI>
<LI>Duty cycle?</LI>
<LI>Performance margin?</LI>
<LI>How much IMD is acceptable?</LI>
<LI>How do you define "performance" in terms of a linear=20
amplifier?</LI></OL><B>
<P>Features</P></B>
<OL>
<LI>What are some of the features you would like to see on future =
linear=20
amplifiers?</LI>
<LI>In a paragraph or so, describe the ultimate legal-limit linear =
amplifier=20
-- one that, if actually produced by a manufacturer, would really =
get your=20
interest.</LI></OL><B>
<P>Cost</P>
<OL></B>
<LI>What is a reasonable price range for your "dream=20
amplifier"?</LI>
<LI>What is a reasonable warranty term and what should be=20
covered?</LI></OL></FONT>
<P> </P></FONT></DIV></BODY></HTML>
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