[Amps] SPE 2K - noisy exhaust fans

Tue Nov 29 23:43:33 EST 2016

As mentioned, the SPE 2K is a very nice amp in many ways, but  my problem 
with them is the fans are very noisy.  They use small  2" exhaust fans that 
run at warp speed and it sounds like a jet engines in the  shack.  I don't 
why SPE uses such small blower fans as there's room for  larger ones.  Larger 
fans running at a slower speed would move the  same amount of air, be 
quieter, and last longer.

73,
Dick- K9OM

In a message dated 11/29/2016 9:57:44 P.M. Eastern Standard Time,  
amps-request at contesting.com writes:

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Today's Topics:

1. A cheer for the  SPE 2K (Charles H)
2. Re: 8877 Grid Connection DC or Not (Jim  W7RY)
3. Re: A cheer for the SPE 2K (Bill  Turner)
4. Re: A cheer for the SPE 2K (Catherine  James)
5. Re: A cheer for the SPE 2K (Jim  W7RY)

----------------------------------------------------------------------

Message:  1
Date: Wed, 30 Nov 2016 00:35:31 +0000
From: Charles H  <k4vud at hotmail.com>
To: "amps at contesting.com"  <amps at contesting.com>
Subject: [Amps] A cheer for the SPE  2K
Message-ID:
<CO2PR13MB01402C5AE01EBA7E871F9FDDF78C0 at CO2PR13MB0140.namprd13.prod.outlook.
com>

Content-Type: text/plain; charset="iso-8859-1"

I am quite  happy with my SPE Expert 2K-FA.

Other than working well, what this amp  provides are

-Good amplifier

-antenna switch, 6.

-SWR  meter.

-two switched inputs.

de  K4VUD

------------------------------

Message: 2
Date:  Tue, 29 Nov 2016 18:38:57 -0600
From: "Jim W7RY"  <jimw7ry at gmail.com>
To: "Ian White"  <gm3sek at ifwtech.co.uk>,     <amps at contesting.com>
Subject: Re: [Amps] 8877 Grid Connection DC or  Not
Message-ID:  <3AD57085A29447819FCA70446905810D at JimsLaptop>
Content-Type:  text/plain; format=flowed; charset="utf-8";
reply-type=original

Thanks Ian.. I'll add it to the several versions of  your board info that I 
already have and use.

I know how amplifier  metering works. This is a special application.

73
Jim  W7RY

-----Original Message----- 
From: Ian White
Sent:  Tuesday, November 29, 2016 12:14 PM
To: amps at contesting.com
Subject: Re:  [Amps] 8877 Grid Connection DC or Not

This reference, page 3 onwards,  may explain what everyone  means.

http://www.ifwtech.co.uk/g3sek/boards/triode/triode-manual.pdf

That  is how it's done in the large majority of HF amplifiers, and in all 
VHF  
triode amplifiers where a well-grounded grid is essential.

73  from Ian GM3SEK

>-----Original Message-----
>From: Amps  [mailto:amps-bounces at contesting.com] On Behalf Of Radio
>WC6W via  Amps
>Sent: 29 November 2016 17:36
>To: Jim W7RY;  AMPS
>Subject: Re: [Amps] 8877 Grid Connection DC or  Not
>
>
>Hi Jim,
>   Why not leave the grid  grounded but, just measure the cathode and plate
>currents then subtract  to calculate the grid current?
>
>73 & Good  morning,
>   Marv  WC6W
>
>http://qsl.net/wc6w/
>
>--------------------------------------------
>On  Mon, 11/28/16, Jim W7RY <jimw7ry at gmail.com> wrote:
>
>  Subject: [Amps] 8877 Grid Connection DC or Not
> To: "AMPS"  <amps at contesting.com>
> Date: Monday, November 28, 2016, 7:00  PM
>
> Has anyone run the grid of an 8877
> not connected to  ground as far as DC is concerned?
>
> I really need to meter the  grid current by bypassing the
> grid to ground with capacitors and  several 10 ohm resistors
> in order to meter grid current. Metering grid  current by the
> CT of the filament transformer, and the ? of the  power
> supply cant be done. Because the power supply ? is
>  directly grounded.
>
> Anyone had luck doing this?
>
>  Thanks 73
> Jim W7RY
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------------------------------

Message: 3
Date: Wed,  30 Nov 2016 01:02:41 +0000
From: Bill Turner  <dezrat at outlook.com>
To: Amps group  <amps at contesting.com>
Subject: Re: [Amps] A cheer for the SPE  2K
Message-ID:
<CY1PR0301MB11964E76B370DCFFAEBA063BC08C0 at CY1PR0301MB1196.namprd03.prod.outl
ook.com>

Content-Type: text/plain; charset="us-ascii"

------------  ORIGINAL MESSAGE ------------(may be snipped)

On Wed, 30 Nov 2016  00:35:31 +0000, you wrote:

>
>I am quite happy with my SPE  Expert 2K-FA.>
>Other than working well, what this amp provides  are
>-Good amplifier
>-antenna switch, 6.
>-SWR  meter.
>-two switched inputs.
>
>de  K4VUD

REPLY:

I had one and I agree with all the above. It's only  drawback is it
won't do legal limit on RTTY or other continuous carrier  mode. After
about 5-10 seconds it overheats and drops back to MID power.  

Other than that, an excellent amp. I now run an Alpha 9500 which  does
not have that limitation, at about the same price but is not  solid
state of  course. 

73, Bill  W6WRT

------------------------------

Message: 4
Date:  Wed, 30 Nov 2016 02:45:13 +0000 (UTC)
From: Catherine James  <catherine.james at att.net>
To: Amps group <amps at contesting.com>,  Bill Turner <dezrat at outlook.com>
Subject: Re: [Amps] A cheer for the  SPE 2K
Message-ID:  <1638129929.3119280.1480473913979 at mail.yahoo.com>
Content-Type:  text/plain; charset=UTF-8

Bill Turner <dezrat at outlook.com>  wrote:
> It's only drawback is it won't do legal limit on RTTY or other  
continuous carrier mode.

Very few amps will run legal limit on 100%  duty cycle RTTY!  I don't think 
I'd want to
pay for the power supply  that would  need.

73,
Cathy
N5WVR

------------------------------

Message:  5
Date: Tue, 29 Nov 2016 20:56:01 -0600
From: "Jim W7RY"  <jimw7ry at gmail.com>
To: "Catherine James"  <catherine.james at att.net>,    "Amps group"
<amps at contesting.com>, "Bill Turner"  <dezrat at outlook.com>
Subject: Re: [Amps] A cheer for the SPE  2K
Message-ID:  <4C5DB1C41A8C41DEB16FB397B75DEDE1 at JimsLaptop>
Content-Type:  text/plain; format=flowed; charset="iso-8859-1";
reply-type=original

1 amp transformer is only $400.00. My power  supplies run RTTY contests at 
1500 watts no issues.

73
Jim  W7RY

-----Original Message----- 
From: Catherine James
Sent:  Tuesday, November 29, 2016 8:45 PM
To: Amps group ; Bill Turner
Subject:  Re: [Amps] A cheer for the SPE 2K

Bill Turner  <dezrat at outlook.com> wrote:
> It's only drawback is it won't do  legal limit on RTTY or other 
continuous 
> carrier mode.

Very few  amps will run legal limit on 100% duty cycle RTTY!  I don't think 
I'd  want to
pay for the power supply that would  need.

73,
Cathy
N5WVR
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