Re: [Elecraft] 2nd Report

[N2TK, Tony]

The operator.
All is well
73,
N2TK, Tony

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Paul Baldock
Sent: Monday, May 28, 2018 11:04 AM
To: Bill Stravinsky ; Elecraft Reflector

Subject: Re: [Elecraft] 2nd Report

What broke on your friends KPA-1500?

- Paul  KW7Y

At 07:45 AM 5/28/2018, Bill Stravinsky via Elecraft wrote:
>  Yeah the fans are pretty noisy especially when CQing without answers 
> which keeps the amp duty cycle high.  At least when you get answers 
> the amp has a chanceto cool just a bit and keep it below 70C which is 
> where the hyper drive fans come into play, hi.  I'm still happy with 
> the amp for several reasons but I still prefer tube amps.I thought I 
> would have two Acom 2000a's but when I saw the new 1500 I figured I 
> would take the solid state plunge for instant on capability but I 
> still prefer my 2000.Tube amps have the same speed fans no matter how 
> hot and how many CQ's you call.  The 1500 sits on top of the Acom 
> quite nicely though, that couldn't happen withtwo Acoms, hi. A friend 
> of mine keeps his amps in the basement with his shack upstairs.  He 
> is awaiting his 1500 to return from Elecraft for a repair but I 
> already emailed him and toldhim he definitely would like to remote the 
> 1500 to the basement, hi.  I could use the Acom more for running 
> somewhat but I was giving the 1500 a pretty rigorous testover the 
> weekend.  I don't know how well noise cancelling headphones will do 
> with the 1500 fans when they start singing over 70C.  I keep the 
> manual speed to at least2 while contesting and sometimes 3.  It helps 
> to get the temp to stay lower for longer periods while the duty cycle 
> subsides.  First big
> contest test of the 1500. BillK3WJV On 
> Monday, May 28, 2018, 10:24:43 AM EDT, Richard Zalewski 
>  wrote:  First major contest with KPA-1500.  
> Overall VERY pleased.  No glitches other than a few operator errors 
> early in the contest.  Loving the amp. Fan noise...another issue.  
> Usually for a cw contest I use some old ear buds.  Not possible with 
> the amp.  Had to use the total ear muffs and still quite noisy.  Did 
> not effect my performance but it is annoying.  I can not imagine what 
> it was like before they released the amp to general public when they 
> changed the fans...made them less noisy???  Still needs some work but 
> at this point probably not possible.  So looking for suggestions for 
> reasonably priced noise cancelling headset with mic if possible. Hope 
> we get full explanation of what gets changed in the next firmware 
> release. Still smiling.
> Richard *W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, 
> W0KDF, W0MQU, J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, 
> VK4AAZ, XE2DV *Be joyful in hope, patient in affliction, faithful in 
> prayer* __
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Re: [Elecraft] 2nd Report

[Clay Autery]

Any chance you have the ability to capture and send me spectrograms at 
each fan setting?  I'd like to get some appreciation for the frequency 
and amplitude "manifest".
One of my amateur radio mentors just received his KPA-1500, but he's 
recovering from triple bypass in the hospital, so I can't even get a 
good look at one...  At least I could get some exterior high res images 
and relevant dimensions.


Also, can someone send me the precise make and model of the fans being used?

73,

__
Clay Autery, KY5G
(318) 518-1389

On 05/28/18 15:46, Richard Zalewski wrote:

Good discussion.  For giggles I ran sound meter at my op position.  About 1
ft below where my head would be so readings would be higher at head level.
Fan Speed   Level (db)
1  50
2  59
3  65
4 70
5 75

So it is going to take some good headsets to help significantly.


Richard
*W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV


*Be joyful in hope, patient in affliction, faithful in prayer*

On Mon, May 28, 2018 at 8:50 AM, Bob McGraw K4TAX 
wrote:

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Re: [Elecraft] 2nd Report

[Richard Zalewski]

Good discussion.  For giggles I ran sound meter at my op position.  About 1
ft below where my head would be so readings would be higher at head level.
Fan Speed   Level (db)
1  50
2  59
3  65
4 70
5 75

So it is going to take some good headsets to help significantly.


Richard
*W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV


*Be joyful in hope, patient in affliction, faithful in prayer*

On Mon, May 28, 2018 at 8:50 AM, Bob McGraw K4TAX 
wrote:

> Although making things a bit larger physically, fans enclosed into the
> equipment case, thus providing some acoustic dampening, and configured to
> pull air into the case {along with much of the noise} and exhausting air
> and noise through several ports is more applicable to reducing overall
> noise.  High volume air moved at slow rates is much quieter than the same
> amount of high volume air moved at faster rates.Also, fans with a lower
> blade tip velocity makes less noise.
>
> As I indicated in an earlier post, some fans are more efficient at
> "blowing" i.e pressurizing the enclosure, while others are more efficient
> at "sucking" thus evacuating the enclosure.  In general, sound moves with
> the air flow.
>
> 73
>
> Bob, K4TAX
>
>
>
> On 5/28/2018 10:10 AM, Drew AF2Z wrote:
>
>> No KPA1500 here but I did replace the fans on my lil' ol KPA3 with
>> Noctuas. They are noticeably quieter. If there is a suitable Noctua
>> replacement for the KPA1500 fans you might want to compare the sound level
>> specs to the Sanyo Denkis.
>>
>> Wonder if it would be possible to build an active noise cancelling system
>> into the rig itself; seems like it would work in that enclosed space...
>>
>> 73,
>> Drew
>> AF2Z
>>
>>
>>
>> On 05/28/18 10:20, Richard Zalewski wrote:
>>
>>> First major contest with KPA-1500. Overall VERY pleased.  No glitches
>>> other than a few operator errors early in the contest.  Loving the amp.
>>>
>>> Fan noise...another issue.  Usually for a cw contest I use some old ear
>>> buds.  Not possible with the amp.  Had to use the total ear muffs and
>>> still
>>> quite noisy.  Did not effect my performance but it is annoying. I can not
>>> imagine what it was like before they released the amp to general public
>>> when they changed the fans...made them less noisy???  Still needs some
>>> work
>>> but at this point probably not possible.  So looking for suggestions for
>>> reasonably priced noise cancelling headset with mic if possible.
>>>
>>> Hope we get full explanation of what gets changed in the next firmware
>>> release.
>>>
>>> Still smiling.
>>>
>>> Richard
>>> *W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
>>> J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV
>>>
>>>
>>> *Be joyful in hope, patient in affliction, faithful in prayer*
>>> __
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to pu...@af2z.net
>>>
>>>
>> __
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>
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Re: [Elecraft] 2nd Report

[Bob McGraw K4TAX]

Although making things a bit larger physically, fans enclosed into the 
equipment case, thus providing some acoustic dampening, and configured 
to pull air into the case {along with much of the noise} and exhausting 
air and noise through several ports is more applicable to reducing 
overall noise.  High volume air moved at slow rates is much quieter than 
the same amount of high volume air moved at faster rates.    Also, fans 
with a lower blade tip velocity makes less noise.


As I indicated in an earlier post, some fans are more efficient at 
"blowing" i.e pressurizing the enclosure, while others are more 
efficient at "sucking" thus evacuating the enclosure.  In general, sound 
moves with the air flow.


73

Bob, K4TAX


On 5/28/2018 10:10 AM, Drew AF2Z wrote:
No KPA1500 here but I did replace the fans on my lil' ol KPA3 with 
Noctuas. They are noticeably quieter. If there is a suitable Noctua 
replacement for the KPA1500 fans you might want to compare the sound 
level specs to the Sanyo Denkis.


Wonder if it would be possible to build an active noise cancelling 
system into the rig itself; seems like it would work in that enclosed 
space...


73,
Drew
AF2Z



On 05/28/18 10:20, Richard Zalewski wrote:

First major contest with KPA-1500. Overall VERY pleased.  No glitches
other than a few operator errors early in the contest.  Loving the amp.

Fan noise...another issue.  Usually for a cw contest I use some old ear
buds.  Not possible with the amp.  Had to use the total ear muffs and 
still
quite noisy.  Did not effect my performance but it is annoying. I can 
not

imagine what it was like before they released the amp to general public
when they changed the fans...made them less noisy???  Still needs 
some work

but at this point probably not possible.  So looking for suggestions for
reasonably priced noise cancelling headset with mic if possible.

Hope we get full explanation of what gets changed in the next firmware
release.

Still smiling.

Richard
*W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV


*Be joyful in hope, patient in affliction, faithful in prayer*
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Re: [Elecraft] 2nd Report

[Drew AF2Z]

No KPA1500 here but I did replace the fans on my lil' ol KPA3 with 
Noctuas. They are noticeably quieter. If there is a suitable Noctua 
replacement for the KPA1500 fans you might want to compare the sound 
level specs to the Sanyo Denkis.


Wonder if it would be possible to build an active noise cancelling 
system into the rig itself; seems like it would work in that enclosed 
space...


73,
Drew
AF2Z



On 05/28/18 10:20, Richard Zalewski wrote:

First major contest with KPA-1500.  Overall VERY pleased.  No glitches
other than a few operator errors early in the contest.  Loving the amp.

Fan noise...another issue.  Usually for a cw contest I use some old ear
buds.  Not possible with the amp.  Had to use the total ear muffs and still
quite noisy.  Did not effect my performance but it is annoying.  I can not
imagine what it was like before they released the amp to general public
when they changed the fans...made them less noisy???  Still needs some work
but at this point probably not possible.  So looking for suggestions for
reasonably priced noise cancelling headset with mic if possible.

Hope we get full explanation of what gets changed in the next firmware
release.

Still smiling.

Richard
*W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV


*Be joyful in hope, patient in affliction, faithful in prayer*
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Re: [Elecraft] 2nd Report

[Paul Baldock]

What broke on your friends KPA-1500?

- Paul  KW7Y

At 07:45 AM 5/28/2018, Bill Stravinsky via Elecraft wrote:
 Yeah the fans are pretty noisy especially when 
CQing without answers which keeps the amp duty 
cycle high.  At least when you get answers the 
amp has a chanceto cool just a bit and keep it 
below 70C which is where the hyper drive fans 
come into play, hi.  I'm still happy with the 
amp for several reasons but I still prefer tube 
amps.I thought I would have two Acom 2000a's 
but when I saw the new 1500 I figured I would 
take the solid state plunge for instant on 
capability but I still prefer my 2000.Tube amps 
have the same speed fans no matter how hot and 
how many CQ's you call.  The 1500 sits on top 
of the Acom quite nicely though, that couldn't 
happen withtwo Acoms, hi. A friend of mine 
keeps his amps in the basement with his shack 
upstairs.  He is awaiting his 1500 to return 
from Elecraft for a repair but I already 
emailed him and toldhim he definitely would 
like to remote the 1500 to the basement, 
hi.  I could use the Acom more for running 
somewhat but I was giving the 1500 a pretty 
rigorous testover the weekend.  I don't know 
how well noise cancelling headphones will do 
with the 1500 fans when they start singing over 
70C.  I keep the manual speed to at least2 
while contesting and sometimes 3.  It helps to 
get the temp to stay lower for longer periods 
while the duty cycle subsides.  First big 
contest test of the 1500. BillK3WJV On 
Monday, May 28, 2018, 10:24:43 AM EDT, Richard 
Zalewski  wrote:  First 
major contest with KPA-1500.  Overall VERY 
pleased.  No glitches other than a few 
operator errors early in the contest.  Loving 
the amp. Fan noise...another issue.  Usually 
for a cw contest I use some old ear buds.  Not 
possible with the amp.  Had to use the total 
ear muffs and still quite noisy.  Did not 
effect my performance but it is annoying.  I 
can not imagine what it was like before they 
released the amp to general public when they 
changed the fans...made them less 
noisy???  Still needs some work but at this 
point probably not possible.  So looking for 
suggestions for reasonably priced noise 
cancelling headset with mic if possible. Hope 
we get full explanation of what gets changed in 
the next firmware release. Still smiling. 
Richard *W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, 
W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU, J68ZR, 
KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, 
VK4AAZ, XE2DV *Be joyful in hope, patient in 
affliction, faithful in prayer* 
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Re: [Elecraft] 2nd Report

[Bill Stravinsky via Elecraft]

 Yeah the fans are pretty noisy especially when CQing without answers which 
keeps the amp duty cycle high.  At least when you get answers the amp has a 
chanceto cool just a bit and keep it below 70C which is where the hyper drive 
fans come into play, hi.  I'm still happy with the amp for several reasons but 
I still prefer tube amps.I thought I would have two Acom 2000a's but when I saw 
the new 1500 I figured I would take the solid state plunge for instant on 
capability but I still prefer my 2000.Tube amps have the same speed fans no 
matter how hot and how many CQ's you call.  The 1500 sits on top of the Acom 
quite nicely though, that couldn't happen withtwo Acoms, hi.
A friend of mine keeps his amps in the basement with his shack upstairs.  He is 
awaiting his 1500 to return from Elecraft for a repair but I already emailed 
him and toldhim he definitely would like to remote the 1500 to the basement, 
hi.  I could use the Acom more for running somewhat but I was giving the 1500 a 
pretty rigorous testover the weekend.  I don't know how well noise cancelling 
headphones will do with the 1500 fans when they start singing over 70C.  I keep 
the manual speed to at least2 while contesting and sometimes 3.  It helps to 
get the temp to stay lower for longer periods while the duty cycle subsides.  
First big contest test of the 1500.

BillK3WJV

On Monday, May 28, 2018, 10:24:43 AM EDT, Richard Zalewski 
 wrote:  
 
 First major contest with KPA-1500.  Overall VERY pleased.  No glitches
other than a few operator errors early in the contest.  Loving the amp.

Fan noise...another issue.  Usually for a cw contest I use some old ear
buds.  Not possible with the amp.  Had to use the total ear muffs and still
quite noisy.  Did not effect my performance but it is annoying.  I can not
imagine what it was like before they released the amp to general public
when they changed the fans...made them less noisy???  Still needs some work
but at this point probably not possible.  So looking for suggestions for
reasonably priced noise cancelling headset with mic if possible.

Hope we get full explanation of what gets changed in the next firmware
release.

Still smiling.

Richard
*W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV


*Be joyful in hope, patient in affliction, faithful in prayer*
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[Elecraft] 2nd Report

[Richard Zalewski]

First major contest with KPA-1500.  Overall VERY pleased.  No glitches
other than a few operator errors early in the contest.  Loving the amp.

Fan noise...another issue.  Usually for a cw contest I use some old ear
buds.  Not possible with the amp.  Had to use the total ear muffs and still
quite noisy.  Did not effect my performance but it is annoying.  I can not
imagine what it was like before they released the amp to general public
when they changed the fans...made them less noisy???  Still needs some work
but at this point probably not possible.  So looking for suggestions for
reasonably priced noise cancelling headset with mic if possible.

Hope we get full explanation of what gets changed in the next firmware
release.

Still smiling.

Richard
*W7ZR* ex:5C5Z, CN2ZR, K2JSP, W6SBZ, W7KXR, K9ZIJ, W9KNF, W0KDF, W0MQU,
J68ZR, KC6ZR, PJ4/W7ZR, KH2,W7ZR, KH6/W7ZR, V31ZR, VK4AAZ, XE2DV


*Be joyful in hope, patient in affliction, faithful in prayer*
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