[TenTec] Replacement output T/R relays for TT linear amps.

Mon Aug 29 23:02:08 EDT 2016

Gentlemen,
   Many thanks for all the input on the antenna relay question..  I 
ordered a couple of the Gigavac
GH-1 models, and will give them a try..  tnx.. 73, Jim W3KA

On 2016-08-22 07:43, Paul Christensen wrote:

> Rick, et. Al...
> 
> The HF115F-H-012-1Z relay has a substantial max. make time of 15 msec., 
> whereas the GH1/HC1/RJ1 are rated at 6 msec. maximum and are typically 
> 1-2 msec.  Even if the typical make time of the HF115F is half the max. 
> rating, it's still too slow for several transceivers that cannot delay 
> the RF envelope in a menu setting.  The HF115F is similar to a 
> Tyco/Schrack model.  They're generally fine for switching RF, even at 
> high power, but not high power at QSK switching speeds.  We need to pay 
> attention to the relay's switching speed.
> 
> Paul, W9AC
> 
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of 
> Rick at DJ0IP.de
> Sent: Monday, August 22, 2016 5:05 AM
> To: 'Discussion of Ten-Tec Equipment' <tentec at contesting.com>
> Subject: Re: [TenTec] Replacement output T/R relays for TT linear amps.
> 
> If this is a BIG issue, I can buy a supply of these and store the with 
> Scott W4PA (Vibroplex/Spiderbeam/INRAD/etc.
> I can ship them for free to him.  Then you must only order in TN.
> 
> ).  I already receive their big catalog anyway.
> 
> Gunner, can you tell me exactly which relay it is... page number in 
> catalog or send a direct link please.
> 
> 73 - Rick, DJ0IP
> (Nr. Frankfurt, Germany)
> 
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of 
> gunnerjuulnyholm at me.com
> Sent: Monday, August 22, 2016 10:40 AM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] Replacement output T/R relays for TT linear amps.
> 
> Hi Jim.
> 
> After 15 years of CW usage the K1 antenna relay had to be changed in my 
> Centurion 422. I agree that the Gigavac relay is super, but if you are 
> looking for a direct and cheap replacement, you can get it from the 
> German post order company <www.reichelt.de <http://www.reichelt.de/>>. 
> Their type no. of the relay  is HF115F-H-012-1Z, and the price is EUR 
> 2,20. The contact rating is 440 Vac and 10 A. Same pin arrangement. - 
> I'm sure that you also can afford a postage of  7 EUR? Handling time < 
> 24 hours.
> 
> You can't avoid also receiving their inch thick catalogue with 1500 
> pages of (almost) any electronic component at very affordable prices.
> 
> The change in the Centurion was quite simple. The relay is inside a 
> sound insulating box filled with rubber foam around the relay, but it 
> is not difficult to get the old relay out. I couldn't put in the new 
> relay in precisely the same position, but I don't hear the relay at all 
> when using CW.
> 
> 73 and good luck!
> 
> Gunner / oz6nf
> 
> On 21 Aug 2016, at 23:11, w3ka at lycos.com wrote:
> 
> Thanks Paul W9AC and Jim K9YC... This sounds like a great way to go.. 
> tnx for the response..
> 73,  Jim W3KA
> 
> On 2016-08-21 20:27, Jim Brown wrote:
> 
> Agreed on all counts.  Several years ago, an engineer in the Alpha 
> booth told me they use Gigavac. I've been using Gigavac as replacements 
> for my TenTec amps for about ten years. I bought them direct from 
> Gigavac under their ham discount program, and I still have a couple of 
> new spares in my parts stash. I don't remember the last time I had to 
> replace a T/R relay -- I'd guess at least 5-6 years, and my operation 
> is 90% CW. I do NOT usually do QSK with those amps though, because of 
> operating speed, the complexity of keying loops with SO2R operation, 
> and not wanting to have to replace a T/R relay in the middle of a 
> contest.
> 73, Jim K9YC
> On Sun,8/21/2016 1:01 PM, Paul Christensen wrote: Jim,
> If you're interested in a premium T/R relay, Gigavac makes the GH-1
> model and is identical to the Kilovac HC-1 and Jennings RJ-1, all of
> which have been time-tested over several decades.
> Gigavac sells direct to us:
> http://www.gigavac.com/catalog/amateur-radio
> Or, check with Alan Bond:
> http://www.mgs4u.com/RF-Microwave/vacuum-relays-SPDT.htm
> You'll need to specify coil voltage as all three vacuum relays are
> produced with several popular voltage ratings.
> Paul, W9AC
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of
> w3ka at lycos.com
> Sent: Sunday, August 21, 2016 2:49 PM
> To: tentec at contesting.com
> Subject: [TenTec] Replacement output T/R relays for TT linear amps.
> Greetings to the group..  After years of QSK CW operation, the
> output T/R relays in my TT Centaur 411, and Centurion 422B are in need 
> of replacement.
> When requesting parts info from Ten Tec, there have been no replies
> to my emails. Does anyone have a generic source (Mouser or Digi-key
> for example) and part numbers for the appropriate replacement relays?
> Tnx..  73, Jim W3KA
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Gunner
-----------------------------------------------
Gunner Juul-Nyholm              OZ6NF-5P5S
Maglegårds Allé 93 B
DK-2860 Søborg
Danmark

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