I'm using an old unit pulled from a commercial FM TX which used a single
4cx1500
tube. It was made for Collins and is about 50 years old but cleaned up nice,
has
rubber isolation mount, balanced brass squirrel cage in the blower, etc. Found
it on e-Bay last year. I use it for my dedcated HB 6 m 8877 amp.
John
----- Original Message ----
From: "amps-request@contesting.com" <amps-request@contesting.com>
To: amps@contesting.com
Sent: Wed, August 8, 2012 3:29:08 PM
Subject: Amps Digest, Vol 116, Issue 17
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of Amps digest..."
Today's Topics:
1. Blower recommendations 8877 amp. (Charles Bibb)
2. Re: Blower recommendations 8877 amp. (Peter Voelpel)
3. Re: Blower recommendations 8877 amp. (Carl)
4. Re: Blower recommendations 8877 amp. (donroden@hiwaay.net)
5. Re: Blower recommendations 8877 amp. (Bruce Osterberg)
6. Re: Blower recommendations 8877 amp. (Jim Barber)
7. Re: Blower recommendations 8877 amp. (Carl)
8. 8877 Blower (Jim W7RY)
9. Re: Blower recommendations 8877 amp. (Radio WC6W)
----------------------------------------------------------------------
Message: 1
Date: Tue, 07 Aug 2012 14:52:44 -0500
From: Charles Bibb <zedkay@telepak.net>
Subject: [Amps] Blower recommendations 8877 amp.
To: amps@contesting.com
Message-ID: <auto-000011432629@telepak.net>
Content-Type: text/plain; charset="us-ascii"; format=flowed
I'm looking for specific blower recommendations for a HB 8877 amp.
(blower maker and model #).
Everyone says use a Papst blower because they are quieter. I use a
Papst fan in my HB 2x3-500 amp.
I have several blowers here. The ones that obviously move enough air
are WAY too loud! The quiet ones I'm not sure about. They seem to
move plenty of air, but don't produce the amount of water level
change recommended by Eimac.
I built a liquid tube manometer gauge to measure the back
pressure. Only the loudest can deliver the minimum 0.41 inch change
in water level that Eimac recommends for the 8877. Surely, there are
compromises that work just fine.
What blower are you guys using in your single 8877
amps? Recommendations, anyone?
73,
Charles - K5ZK
------------------------------
Message: 2
Date: Tue, 7 Aug 2012 22:14:45 +0200
From: "Peter Voelpel" <df3kv@t-online.de>
Subject: Re: [Amps] Blower recommendations 8877 amp.
To: <amps@contesting.com>
Message-ID: <2CBE3CFDFF9C4ADD8F86AE18003C03F9@shack>
Content-Type: text/plain; charset="us-ascii"
Hi Charles,
The EBM-Papst model G2E085-AA01-01 will be sufficient for the 8877.
Of course, any blower will cause more noise then a fan.
If the tube is not run at full dissipation you can always reduce the blower
voltage and by that the noise level.
I use the G2E085 with 3x3CX800A7.
73
Peter, DJ7WW
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Charles Bibb
Sent: Dienstag, 7. August 2012 21:53
To: amps@contesting.com
Subject: [Amps] Blower recommendations 8877 amp.
I'm looking for specific blower recommendations for a HB 8877 amp.
(blower maker and model #).
Everyone says use a Papst blower because they are quieter. I use a Papst
fan in my HB 2x3-500 amp.
I have several blowers here. The ones that obviously move enough air are WAY
too loud! The quiet ones I'm not sure about. They seem to move plenty of
air, but don't produce the amount of water level change recommended by
Eimac.
I built a liquid tube manometer gauge to measure the back pressure. Only
the loudest can deliver the minimum 0.41 inch change in water level that
Eimac recommends for the 8877. Surely, there are compromises that work just
fine.
What blower are you guys using in your single 8877 amps? Recommendations,
anyone?
73,
Charles - K5ZK
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
------------------------------
Message: 3
Date: Tue, 7 Aug 2012 16:43:22 -0400
From: "Carl" <km1h@jeremy.mv.com>
Subject: Re: [Amps] Blower recommendations 8877 amp.
To: <amps@contesting.com>, "Charles Bibb" <zedkay@telepak.net>
Message-ID: <C3C35A91A92C4D1B9C2DB37D171F4C91@computer1>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
There are charts that relate blower speed and impeller diameter to cfm.
Since the Eimac listing is for CCS commercial duty we hams get some slack at
least for SSB/CW.
EBM-Papst appears to have the tightest tolerances and lowest friction which
do cut down on the noise, especially when using a lower rpm motor.
Carl
KM1H
----- Original Message -----
From: "Charles Bibb" <zedkay@telepak.net>
To: <amps@contesting.com>
Sent: Tuesday, August 07, 2012 3:52 PM
Subject: [Amps] Blower recommendations 8877 amp.
>
> I'm looking for specific blower recommendations for a HB 8877 amp.
> (blower maker and model #).
>
> Everyone says use a Papst blower because they are quieter. I use a
> Papst fan in my HB 2x3-500 amp.
>
> I have several blowers here. The ones that obviously move enough air
> are WAY too loud! The quiet ones I'm not sure about. They seem to
> move plenty of air, but don't produce the amount of water level
> change recommended by Eimac.
>
> I built a liquid tube manometer gauge to measure the back
> pressure. Only the loudest can deliver the minimum 0.41 inch change
> in water level that Eimac recommends for the 8877. Surely, there are
> compromises that work just fine.
>
> What blower are you guys using in your single 8877
> amps? Recommendations, anyone?
>
> 73,
> Charles - K5ZK
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
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> No virus found in this message.
> Checked by AVG - www.avg.com
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------------------------------
Message: 4
Date: Tue, 07 Aug 2012 16:22:22 -0500
From: donroden@hiwaay.net
Subject: Re: [Amps] Blower recommendations 8877 amp.
To: amps@contesting.com
Message-ID: <20120807162222.99223dfpoa84hu6m@webmail.hiwaay.net>
Content-Type: text/plain; charset=ISO-8859-1; DelSp="Yes";
format="flowed"
Several years ago, I worked on a FM transmitter that used a very large
diameter blower with a cast-aluminum housing with a small inlet and
outlet, and it was very quiet. Maybe the sound-dampening of the thick
aluminum and the slower rotational speed, but it could have been put
in a remote box and the air fed to the amp with a flex hose and all
you would hear would be the air.
Don W4DNR
------------------------------
Message: 5
Date: Tue, 07 Aug 2012 19:08:23 -0500
From: Bruce Osterberg <n9bx@mchsi.com>
Subject: Re: [Amps] Blower recommendations 8877 amp.
To: amps@contesting.com
Message-ID: <5021ADF7.7070105@mchsi.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Since you Asked Specifically for an 8877 Tube and a Part number for a
Blower for that Tube, Here is My Recommendation and What I use on My
W6PO Amplifier, That I use Key Down on EME with WSJT for a 60 Second
Time Period:
FASCO NO 702111713 Type U21B RPM 3030
1/25 HP .49 Amps at 115 Volts Part Number 25-7615
73 Bruce N9BX 73
On 8/7/2012 3:14 PM, Peter Voelpel wrote:
> Hi Charles,
>
> The EBM-Papst model G2E085-AA01-01 will be sufficient for the 8877.
> Of course, any blower will cause more noise then a fan.
> If the tube is not run at full dissipation you can always reduce the blower
> voltage and by that the noise level.
> I use the G2E085 with 3x3CX800A7.
>
> 73
> Peter, DJ7WW
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of Charles Bibb
> Sent: Dienstag, 7. August 2012 21:53
> To: amps@contesting.com
> Subject: [Amps] Blower recommendations 8877 amp.
>
>
> I'm looking for specific blower recommendations for a HB 8877 amp.
> (blower maker and model #).
>
> Everyone says use a Papst blower because they are quieter. I use a Papst
> fan in my HB 2x3-500 amp.
>
> I have several blowers here. The ones that obviously move enough air are WAY
> too loud! The quiet ones I'm not sure about. They seem to move plenty of
> air, but don't produce the amount of water level change recommended by
> Eimac.
>
> I built a liquid tube manometer gauge to measure the back pressure. Only
> the loudest can deliver the minimum 0.41 inch change in water level that
> Eimac recommends for the 8877. Surely, there are compromises that work just
> fine.
>
> What blower are you guys using in your single 8877 amps? Recommendations,
> anyone?
>
> 73,
> Charles - K5ZK
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
------------------------------
Message: 6
Date: Tue, 07 Aug 2012 18:00:04 -0700
From: Jim Barber <audioguy@q.com>
Subject: Re: [Amps] Blower recommendations 8877 amp.
To: Bruce Osterberg <n9bx@mchsi.com>
Cc: amps@contesting.com
Message-ID: <5021BA14.3020408@q.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
EBM-Papst G2E108-AA05-44
Enough "oomph" to overcome normal chassis back pressure
and also push air around a 4-inch, 90-degree acoustic
sweep and out six feet of 4-inch hose. Cast aluminum
housing, roughly 77 CFM at 0.41 inches of water.
54 dB A-weighted, less when installed correctly and both
intake and exhaust are properly treated.
Available from Newark, OnlineComponents.com, Allied, etc.
(requires 4uF capacitor and finger screen, not included)
73,
Jim N7CXI
On 8/7/2012 5:08 PM, Bruce Osterberg wrote:
> Since you Asked Specifically for an 8877 Tube and a Part number for a
> Blower for that Tube, Here is My Recommendation and What I use on My
> W6PO Amplifier, That I use Key Down on EME with WSJT for a 60 Second
> Time Period:
>
> FASCO NO 702111713 Type U21B RPM 3030
> 1/25 HP .49 Amps at 115 Volts Part Number 25-7615
>
> 73 Bruce N9BX 73
>
> On 8/7/2012 3:14 PM, Peter Voelpel wrote:
>> Hi Charles,
>>
>> The EBM-Papst model G2E085-AA01-01 will be sufficient for the 8877.
>> Of course, any blower will cause more noise then a fan.
>> If the tube is not run at full dissipation you can always reduce the blower
>> voltage and by that the noise level.
>> I use the G2E085 with 3x3CX800A7.
>>
>> 73
>> Peter, DJ7WW
>>
>> -----Original Message-----
>> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
>> Behalf Of Charles Bibb
>> Sent: Dienstag, 7. August 2012 21:53
>> To: amps@contesting.com
>> Subject: [Amps] Blower recommendations 8877 amp.
>>
>>
>> I'm looking for specific blower recommendations for a HB 8877 amp.
>> (blower maker and model #).
>>
>> Everyone says use a Papst blower because they are quieter. I use a Papst
>> fan in my HB 2x3-500 amp.
>>
>> I have several blowers here. The ones that obviously move enough air are WAY
>> too loud! The quiet ones I'm not sure about. They seem to move plenty of
>> air, but don't produce the amount of water level change recommended by
>> Eimac.
>>
>> I built a liquid tube manometer gauge to measure the back pressure. Only
>> the loudest can deliver the minimum 0.41 inch change in water level that
>> Eimac recommends for the 8877. Surely, there are compromises that work just
>> fine.
>>
>> What blower are you guys using in your single 8877 amps? Recommendations,
>> anyone?
>>
>> 73,
>> Charles - K5ZK
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
------------------------------
Message: 7
Date: Tue, 7 Aug 2012 21:28:58 -0400
From: "Carl" <km1h@jeremy.mv.com>
Subject: Re: [Amps] Blower recommendations 8877 amp.
To: <audioguy@q.com>, "Bruce Osterberg" <n9bx@mchsi.com>
Cc: amps@contesting.com
Message-ID: <B3E7F4B96AA24BA2BF25DD163BCFEF76@computer1>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Thats serious overkill.
Use the one thats in the AL-1500
F. 410-1200,
$64.95.
EBM Blower,
G2S097-
DB61-08, 110
VAC, 37 CFM, 45
dBA noise level.
Wire leads.
51/2Wx51/2Hx11/2D
inches
Carl
KM1H
----- Original Message -----
From: "Jim Barber" <audioguy@q.com>
To: "Bruce Osterberg" <n9bx@mchsi.com>
Cc: <amps@contesting.com>
Sent: Tuesday, August 07, 2012 9:00 PM
Subject: Re: [Amps] Blower recommendations 8877 amp.
> EBM-Papst G2E108-AA05-44
>
> Enough "oomph" to overcome normal chassis back pressure
> and also push air around a 4-inch, 90-degree acoustic
> sweep and out six feet of 4-inch hose. Cast aluminum
> housing, roughly 77 CFM at 0.41 inches of water.
> 54 dB A-weighted, less when installed correctly and both
> intake and exhaust are properly treated.
>
> Available from Newark, OnlineComponents.com, Allied, etc.
> (requires 4uF capacitor and finger screen, not included)
>
> 73,
> Jim N7CXI
>
> On 8/7/2012 5:08 PM, Bruce Osterberg wrote:
>> Since you Asked Specifically for an 8877 Tube and a Part number for a
>> Blower for that Tube, Here is My Recommendation and What I use on My
>> W6PO Amplifier, That I use Key Down on EME with WSJT for a 60 Second
>> Time Period:
>>
>> FASCO NO 702111713 Type U21B RPM 3030
>> 1/25 HP .49 Amps at 115 Volts Part Number 25-7615
>>
>> 73 Bruce N9BX 73
>>
>> On 8/7/2012 3:14 PM, Peter Voelpel wrote:
>>> Hi Charles,
>>>
>>> The EBM-Papst model G2E085-AA01-01 will be sufficient for the 8877.
>>> Of course, any blower will cause more noise then a fan.
>>> If the tube is not run at full dissipation you can always reduce the
>>> blower
>>> voltage and by that the noise level.
>>> I use the G2E085 with 3x3CX800A7.
>>>
>>> 73
>>> Peter, DJ7WW
>>>
>>> -----Original Message-----
>>> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
>>> On
>>> Behalf Of Charles Bibb
>>> Sent: Dienstag, 7. August 2012 21:53
>>> To: amps@contesting.com
>>> Subject: [Amps] Blower recommendations 8877 amp.
>>>
>>>
>>> I'm looking for specific blower recommendations for a HB 8877 amp.
>>> (blower maker and model #).
>>>
>>> Everyone says use a Papst blower because they are quieter. I use a
>>> Papst
>>> fan in my HB 2x3-500 amp.
>>>
>>> I have several blowers here. The ones that obviously move enough air are
>>> WAY
>>> too loud! The quiet ones I'm not sure about. They seem to move plenty of
>>> air, but don't produce the amount of water level change recommended by
>>> Eimac.
>>>
>>> I built a liquid tube manometer gauge to measure the back pressure.
>>> Only
>>> the loudest can deliver the minimum 0.41 inch change in water level that
>>> Eimac recommends for the 8877. Surely, there are compromises that work
>>> just
>>> fine.
>>>
>>> What blower are you guys using in your single 8877 amps?
>>> Recommendations,
>>> anyone?
>>>
>>> 73,
>>> Charles - K5ZK
>>>
>>> _______________________________________________
>>> Amps mailing list
>>> Amps@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>>
>>> _______________________________________________
>>> Amps mailing list
>>> Amps@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1424 / Virus Database: 2437/5184 - Release Date: 08/07/12
>
------------------------------
Message: 8
Date: Tue, 7 Aug 2012 18:44:42 -0700
From: Jim W7RY <jimw7ry@gmail.com>
Subject: [Amps] 8877 Blower
To: Amplifier Reflector <amps@contesting.com>
Message-ID:
<CAF7eEW0E=PxGt1=5_QWY91GXc+uyBoenZAQd_jSXY16RiJUq1g@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Actually Carl, the Ameritron AL-1500 part number (410-3737) crosses to
a *G2S085-AA19-15.
Ameritron stocks the part number you posted but it has no mounting flange.
At least according to this page:
http://www.onlinecomponents.com/ebm-papst_g2s097-db61-08.html?p=12102652.
73
Jim W7RY
*
------------------------------
Message: 9
Date: Wed, 8 Aug 2012 08:28:46 -0700 (PDT)
From: Radio WC6W <wc6w_amps@yahoo.com>
Subject: Re: [Amps] Blower recommendations 8877 amp.
To: Charles Bibb <zedkay@telepak.net>, amps@contesting.com
Message-ID:
<1344439726.3412.YahooMailClassic@web121405.mail.ne1.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Hi Charles,
http://www.comairrotron.com/content/spinnaker-spd24b1-032183
Note that the reference to AC on the web data sheet is in error. It is a DC
blower.
73 & Good morning,
Marv WC6W
http://qsl.net/wc6w/
--- On Tue, 8/7/12, Charles Bibb <zedkay@telepak.net> wrote:
> From: Charles Bibb <zedkay@telepak.net>
> Subject: [Amps] Blower recommendations 8877 amp.
> To: amps@contesting.com
> Date: Tuesday, August 7, 2012, 12:52 PM
>
> I'm looking for specific blower recommendations for a HB
> 8877 amp.
> (blower maker and model #).
>
> Everyone says use a Papst blower because they are
> quieter.? I use a
> Papst fan in my HB 2x3-500 amp.
>
> I have several blowers here. The ones that obviously move
> enough air
> are WAY too loud! The quiet ones I'm not sure about. They
> seem to
> move plenty of air, but don't produce the amount of water
> level
> change recommended by Eimac.
>
> I built a liquid tube manometer gauge to measure the back
> pressure.? Only the loudest can deliver the minimum
> 0.41 inch change
> in water level that Eimac recommends for the 8877.?
> Surely, there are
> compromises that work just fine.
>
> What blower are you guys using in your single 8877
> amps?? Recommendations, anyone?
>
> 73,
> Charles - K5ZK
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
------------------------------
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End of Amps Digest, Vol 116, Issue 17
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