[Amps] Blower recommendations 8877 amp.

[Carl]

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 at q.com>
To: "Bruce Osterberg" <n9bx at mchsi.com>
Cc: <amps at 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 at contesting.com [mailto:amps-bounces at contesting.com] 
>>> On
>>> Behalf Of Charles Bibb
>>> Sent: Dienstag, 7. August 2012 21:53
>>> To: amps at 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
>>>
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