Barry,
Thanks for the info re dates, my slip up on when I was at the first QTH
with a TH7DX. I definitely had a TH7DX but as I think more about it, it
was later, probably 1982.
Memory is the second thing to go.
Thanks,
Grant KZ1W
On 3/30/2012 9:10 AM, Barry Merrill, W5GN wrote:
> I don't think you had a TH7 in 1978.
>
> I ordered a TH6 in Feb, 1981, and was called by
> HyGain who said there was this brand new TH7; they
> had had one on their test range for several weeks,
> and maybe one of the employees had one at home but
> they had not sold one yet and wanted to know if
> I would buy serial number one, or if I really wanted
> the TH6 they would send it instead.
> So I'm pretty sure than in Feb 1981 I installed
> TH7DX Serial Number ONE.
>
> Barry, W5GN
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Grant Saviers
> Sent: Thursday, March 29, 2012 11:16 PM
> To: Mike Newman
> Cc: towertalk@contesting.com
> Subject: Re: [TowerTalk] Hy- Gain Thunderbird
>
> I've owned three TH7DXs, first one in 1978. #1& #2 were made by HyGain,
> it's now made by MFJ. I think that before that Telrex made them and as far
> as I can tell they are mechanically identical. I think there
> may have been some tweaks to the feed balun, but am not sure. I now
> have a brand new Telrex made model I picked up at an estate sale, but mice
> ate the original shipping boxes (NINB - new in no box?). I don't think it
> is fair to characterize it as log periodic, since the directors and
> reflectors are trap tuned (or unique) to each band. It does have two driven
> elements for broader bandwidth. My first two survived several Massachusetts
> hurricanes and worked well.
>
> Grant KZ1W
>
> On 3/29/2012 5:54 PM, Mike Newman wrote:
>> Hi all
>>
>> Looks like there are a few models called Thunderbird.
>>
>> The one I'm enquiring about has a diagram entitled
>>
>> TH11DX 5 band (14 - 30 MHz) Super Thunderbird Yagi Antenna.
>>
>> It has 11 elements. It's probably a log-periodic in part with other
>> elements interleaved, all on a 24 ft long boom.
>>
>> An operator here has one, and we are using it as an example in an
>> planning dispute.
>>
>> Can any one on this list tell me approximately when this antenna was
>> first marketed, and whether the design has changed over the years?
>>
>> 73 de miken, zl1bnb
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|