jeremy-ca wrote:
> With 2M amps being not that uncommon the price is usually lower.
>
> With the only 222 amps being custom made or modified as that one they
> tend to be more in demand. And you know what happens on Ebay when the
> frenzy starts.
>
> Those holes look to be for extra air flow thru the cover after it got
> hot and deformed. I'd open it all the way and install a silicon rubber
> chimney with a non restrictive mesh on top. I had to do that with my
> 144 and 222 amps; made a huge difference and no more tuning drift.
>
> Prices are even higher for a good 432 amp in the 8938 and 2x 3CX800
> category.
If you'd move to Michigan you'd not have a problem with expensive 432
amps. They are downright cheap over here. Of course we can only run 50
watts so that might factor in there somewhere. <:-))
OTOH I'm looking at eventually building something for 2.4 and 5 Gig.
73
Roger (K8RI)
> I gave up finding a 8938 at a good price and wound up rebuilding a
> Collins USAF 350 MHz cavity amp with a GE 2500W dissipation monster
> tetrode. It was designed for a KW out as an AM linear.
>
> Carl
> KM1H
>
>
>
>
>
> ----- Original Message ----- From: "Roger (K8RI)"
> <sub1@rogerhalstead.com>
> To: "jeremy-ca" <km1h@jeremy.mv.com>
> Cc: "Amps" <amps@contesting.com>
> Sent: Sunday, March 23, 2008 2:18 AM
> Subject: Re: [Amps] What is this amp set up for
>
>
>> jeremy-ca wrote:
>>> When I first saw that listing it said modified; I see he has revised
>>> it.
>>>
>>> Thats not a bad price for smoke on 222 if the tube is perfect and
>>> trimming back the strip line should be rather easy
>> I would think it's too high even with a new tube. Really nice ones
>> unmodified on 2, or 6-meters have been going for around $1400 (give
>> or take) Look carefully at the top. It is bent in and has a
>> circular row of what appear to be holes. I have one on 2 that is
>> *almost* mint. It looked crappy when I purchased it at a swap. I
>> figured I could use it for parts and hoped for a reasonably good
>> tube. A little cleaner and it looks almost new with a good tube.
>>
>> 73
>>
>> Roger (K8RI)
>>>
>>> My own amp for 222 is a 8877 and I scaled down a 2M version and then
>>> used a VNA for final trimming. I built it in a partially built Henry
>>> 44-46 MHz box I picked up in a swap.
>>>
>>> Carl
>>> KM1H
>>>
>>>
>>> Carl
>>> KM1H
>>> ----- Original Message ----- From: "Roger (K8RI)"
>>> <sub1@rogerhalstead.com>
>>> To: "jeremy-ca" <km1h@jeremy.mv.com>
>>> Cc: "Amps" <amps@contesting.com>
>>> Sent: Saturday, March 22, 2008 9:19 PM
>>> Subject: Re: [Amps] What is this amp set up for
>>>
>>>
>>>> jeremy-ca wrote:
>>>>> Hmmm, his description says it is modified for 220.
>>>>
>>>> Isn't that "modifiable" to 220?
>>>> Although advertised as a 2-meter amp, "I'd guess" it's one of those
>>>> that was used for plasma or industrial heating at 200 MHz that can
>>>> be modified for 220. Some outfit has had a similar one in very
>>>> nice shape (with new tube)on there since last Fall with no takers.
>>>> Their BIN price has finally started down. Unless they find some
>>>> one who really wants (and can use) one for 220 both are basically
>>>> parts amps.
>>>>
>>>> I purchased one all set up for the 2-meter band in good shape that
>>>> only required a good cleaning for less than he's asking for one
>>>> that may require a lot of work. I was learning about building
>>>> filters for it on here last summer.
>>>>
>>>> 73
>>>>
>>>> Roger (K8RI)
>>>>> Carl
>>>>> KM1H
>>>>>
>>>>>
>>>>> ----- Original Message ----- From: "Roger (K8RI)"
>>>>> <sub1@rogerhalstead.com>
>>>>> To: "Amps" <amps@contesting.com>
>>>>> Sent: Saturday, March 22, 2008 7:59 PM
>>>>> Subject: [Amps] What is this amp set up for
>>>>>
>>>>>
>>>>>> the amp listed on
>>>>>> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=350038955687&ssPageName=ADME:X:AAQ:US:1123
>>>>>>
>>>>>>
>>>>>> is listed as a 2-meter amp but the specs list it as 200 MHz +/-10
>>>>>> Mhz.
>>>>>> Also the output filter is far smaller than the one in my 2002A
>>>>>> which is
>>>>>> set up for 2-meters.
>>>>>>
>>>>>> 73
>>>>>>
>>>>>> Roger (K8RI)
>>>>>> _______________________________________________
>>>>>> Amps mailing list
>>>>>> Amps@contesting.com
>>>>>> http://lists.contesting.com/mailman/listinfo/amps
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>
>
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