[TowerTalk] Hygain TH3

Thu Mar 17 13:59:43 PDT 2011

Not sure if anyone ever answered the original question.

Working on 10m indicates the 10m traps are OK.  Not working on 15/20  
indicates the 15m traps are the problem.

Good luck
Don
N8DE

Quoting "Harry Herr, W6HH" <w6hh at hughes.net>:

>   I'm with Jim, W7RY, on this one.
>
> I drove my stock TH-7DX with an Alpha 87A for almost 10,000 Q's from HL
> with NO problems.
>
> Harry, W6HH
>
> On 03/16/11 20:12, Jim W7RY wrote:
>> I use a BN-86 on my TH-7DX and have for many years.  And I run 1500 watts
>> out on RTTY in contest mode. Never burned up one yet!
>>
>> 73
>> Jim W7RY
>>
>>
>>
>> --------------------------------------------------
>> From: "Gene Fuller"<w2lu at rochester.rr.com>
>> Sent: Wednesday, March 16, 2011 5:07 PM
>> To: "Mike Baker"<k7dd at cox.net>; "'Diane&  Edward Swynar'"
>> <deswynar at xplornet.ca>; "'towertalk'"<towertalk at contesting.com>
>> Subject: Re: [TowerTalk] Hygain TH3
>>
>>> I certainly agree with Mike re the BN-86. The PO of the TH-6DX that I
>>> rebuilt only used 100 watts so it had been no problem. However, with 1.5
>>> KW
>>> it's not long for this world. If you're not one to get up tight over such
>>> things, the old 8 or so turns of coax maybe about 8" diameter would be not
>>> too bad a starting point. I realize that this is a controversial point,
>>> that's why I say "a starting point'. There are certainly more elegant, and
>>> technically superior ways too do a balun, but the coax coil is better than
>>> nothing, inexpensive and quite reliably.
>>>
>>> Gene / W2LU
>>>
>>>
>>> ----- Original Message -----
>>> From: "Mike Baker"<k7dd at cox.net>
>>> To: "'Gene Fuller'"<w2lu at rochester.rr.com>; "'Diane&  Edward Swynar'"
>>> <deswynar at xplornet.ca>; "'towertalk'"<towertalk at contesting.com>
>>> Sent: Wednesday, March 16, 2011 5:59 PM
>>> Subject: Re: [TowerTalk] Hygain TH3
>>>
>>>
>>>> Hi Guys,
>>>> I concur with the disassemble, clean, lube, reassemble list and
>>>> keeping the drain holes pointed down. I have used both Penetrox and
>>>> Bencher's Butter-its-not between conductors and where stainless steel
>>>> hardware is use, a suitable thread lube to prevent galling of the SS
>>>> threads. Nylock nuts are a blessing that helps get rid of the cut washers
>>>> and makes everything stay together.
>>>> When I did the last set of traps on a TH-5, I used a very sharp
>>>> drill bit and drilled out the dimples carefully so the hole was cleanly
>>>> cut
>>>> and didn't leave a flash at the hole edge inside to cramp up the removal.
>>>> When I reassembled the traps, I used a good grade of RTV (Loctite Blue
>>>> Silicone Gasket Material and just plugged them with an oversize mushroom
>>>> head dimple to keep out the water and grunge.
>>>> When you perform your rebuild, you might want to scrap the BN-86
>>>> balun (if you used one) for something a bit more efficient. If you run an
>>>> amp replacement is not a question: it's a necessity. The BN-86 was never
>>>> designed to handle 1500W, especially if you are running RTTY or similar
>>>> full
>>>> duty cycle modes.
>>>> They are a good antenna. I wish I hadn't sold mine years ago.
>>>>
>>>> Mike Baker  K7DD
>>>> K7dd at cox.net
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: towertalk-bounces at contesting.com
>>>> [mailto:towertalk-bounces at contesting.com] On Behalf Of Gene Fuller
>>>> Sent: Wednesday, March 16, 2011 10:16 AM
>>>> To: Diane&  Edward Swynar; towertalk
>>>> Subject: Re: [TowerTalk] Hygain TH3
>>>>
>>>> Hi Eddy -
>>>>
>>>> A few years ago I rebuilt an old heavily damaged TH-6DX. I cleaned and
>>>> "greased" (Penetrox) all of the tubing "joints". Took apart all of the
>>>> traps
>>>> and cleaned them and "greased" all of the electrical contact areas.
>>>> Replaced
>>>> the hardware with ss where possible.  It has worked great since and was
>>>> well
>>>> worth the effort. The closest thing to a problem was getting the cans off
>>>> the traps because of the dimples they put in the cans after assembly. I
>>>> found a piece of tubing, with o.d. just smaller than the i.d. of the can,
>>>> that I could insert and tap on to force the trap form out.
>>>>
>>>> Gene / W2LU
>>>>
>>>>
>>>> ----- Original Message -----
>>>> From: "Diane&  Edward Swynar"<deswynar at xplornet.ca>
>>>> To: "towertalk"<towertalk at contesting.com>
>>>> Sent: Wednesday, March 16, 2011 12:50 PM
>>>> Subject: [TowerTalk] Hygain TH3
>>>>
>>>>
>>>>> Hi Guys,
>>>>>
>>>>> This has nothing particularly to do with TOWERS, per se, but I'm
>>>>> wondering
>>>>> if anyone reading this might have an idea, or two (it'll require
>>>>> CLIMBING
>>>>> the tower here in any event, I'm sure!).
>>>>>
>>>>> Specifically, I have a Hygain TH3 - Mark III 3-element tri-band yagi at
>>>>> 48'
>>>>> here that has basically been idle, as I concentrated my efforts on the
>>>>> low
>>>>> bands for some 4 years now. Anyway, I re-discovered 10-meters with the
>>>>> inordinately high sunspot count of late, and pressed the yagi into
>>>>> service
>>>>> there with stellar results.
>>>>>
>>>>> Inspired, I next tried the antenna on both 20- and 15-meters, but was
>>>>> shocked to see the SWR inordinately high right across each band...
>>>>>
>>>>> Obviously something up there has gone awry in the preceding years---but
>>>>> why
>>>>> is it still A-OK on 10-meters...?
>>>>>
>>>>> Thanks in advance, with my vy
>>>>>
>>>>> ~73~ de Eddy VE3CUI - VE3XZ
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> TowerTalk mailing list
>>>>> TowerTalk at contesting.com
>>>>> http://lists.contesting.com/mailman/listinfo/towertalk
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