Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
Search
817 Amps
|
I found this discussion of interest at the EHam Elmers forum:
<<<I was wondering if there were any recommendations for amplifiers that work with the FT-817. I'm a rank beginner, and QRP DX-ing is probably a bit beyond me. I'd like something that can take my 2.5 - 5 W and give me more like 35 - 50. My guess is that any HF frequencies would do. This would be for a base station setup with a serious antenna (maybe a yagi or dipole). RE: Amplifier for FT-817 Reply I'd recommend the Communications Concepts (CCI) amps, like model #EB63 (as an example). These are kits, not factory built, but come with good instructions and all the parts to build into an amplifier except for the heat sink and chassis, which you can buy from Radio Shack or many other sources. I built an EB63 twelve years ago, and it still works perfectly! It is a very robust design, based on a famous Motorola Engineering Bulletin (#EB63!). CCI sells many other HF amps, from 20W output to 1000W output, also based on Motorola Applications Notes or Engineering Bulletins, so they have quite a variety of models to choose from -- all of which are attractively priced. Although not quite as easy as "Heathkits" (darn it), the CCI kits are easy to assemble for anyone with any level of homebrewing or kitbuilding experience. The EB63, for example, produces 100W output for 5W drive power, and can run up to 140W output (with about 7-8W drive power) before it saturates, and requires only a standard 12-14Vdc power supply, nothing unusual. It also contains RF-sensed T/R switching, so a separate "amplifier key" line is not required. There are many other options available, from other sources, but I like this one. Have fun with the 817! |
|
He may or may not be interested in an Amp of this magnitude but I have used
toggle quoted message
Show quoted text
the FT-817 to drive my Ten-Tec Hercules II solid state linear. It varies a little from band to band but will put out up to 150 watts with the 5 watts drive. Herc II's are no longer manufactured but Ten-Tec still services them and they can be found in the used marketplace. ----- 73, Rich - W3ZJ www.w3zj.com -----Original Message-----
From: painisgone@... [mailto:painisgone@...] Sent: Wednesday, June 13, 2001 8:12 PM To: FT817@... Subject: [FT817] 817 Amps I found this discussion of interest at the EHam Elmers forum: <<<I was wondering if there were any recommendations for amplifiers that work with the FT-817. I'm a rank beginner, and QRP DX-ing is probably a bit beyond me. I'd like something that can take my 2.5 - 5 W and give me more like 35 - 50. My guess is that any HF frequencies would do. This would be for a base station setup with a serious antenna (maybe a yagi or dipole). RE: Amplifier for FT-817 Reply I'd recommend the Communications Concepts (CCI) amps, like model #EB63 (as an example). These are kits, not factory built, but come with good instructions and all the parts to build into an amplifier except for the heat sink and chassis, which you can buy from Radio Shack or many other sources. I built an EB63 twelve years ago, and it still works perfectly! It is a very robust design, based on a famous Motorola Engineering Bulletin (#EB63!). CCI sells many other HF amps, from 20W output to 1000W output, also based on Motorola Applications Notes or Engineering Bulletins, so they have quite a variety of models to choose from -- all of which are attractively priced. Although not quite as easy as "Heathkits" (darn it), the CCI kits are easy to assemble for anyone with any level of homebrewing or kitbuilding experience. The EB63, for example, produces 100W output for 5W drive power, and can run up to 140W output (with about 7-8W drive power) before it saturates, and requires only a standard 12-14Vdc power supply, nothing unusual. It also contains RF-sensed T/R switching, so a separate "amplifier key" line is not required. There are many other options available, from other sources, but I like this one. Have fun with the 817! Yahoo! Groups Sponsor To unsubscribe from this group, send an email to: FT817-unsubscribe@... and for a great FAQ ( Frequently Asked Questions ) see Please note that your messages and files sent to this group become public domain upon submission and may appear anywhere on the Internet or in print without notice or compensation. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
|
F.B. Nutter, Jr.
Hi John,
They are unfiltered & require the addition of filters to keep the FCC & your neighbors happy. I am thinking about 1 of these amps myself. I guess CCI at least gives you schematics for the LPFs. 73, Fil W8FIL "John O. Newell" wrote: [www.debticated.com]I'd recommend the Communications Concepts (CCI) amps, like modelThese are unfiltered? / / yes / / no / / maybe
|
|
--- In FT817@y..., "F.B. Nutter, Jr." <fbnjr@m...> wrote:
Hi John,the FCC & your neighbors happy. I am thinking about 1 of these amps myself. I guess CCI at least gives you schematics for the LPFs. 73, Fil W8FILHi Fil, For those under the FCC rules, building the CCI amp (or the like), even with the addition of filters, etc., violates Rule 97.315 -- you can not buiild an external RF amp from a kit if the input is < 50 W for full-rated output. The definition of "kit" as used by the FCC is remarkably broad. I note that under the rules, it is OK for the kit to be sold to you, you just can not build it. In contrast, if you find a suitable amp that you can use directly that is already build (kit or otherwise) or you can mod the amp to meet the FCC emission regulations, it is OK for you to buy, own and operate it. However, it is likely illegal for the person to sell it (exceptions are ham dealers, ham-to-ham, ...) to you are anyone else. This is why THP does not sell their amps in the US. Roll your own design and build that legally (and maybe have a lot of fun too). 72/73 de Barry - W4WB |
to navigate to use esc to dismiss