Glastics arrived ! Bigger than I thought. 1.75" Diameter....and 2.25" tall. Things of beauty. 3/8" NC embedded steel threads on each end.


Got the matched pair of 3/4" plywood sheets painted. Gloss black. Home depot small spray bomb..with primer included with the paint, so no priming required. Drys real fast. Applied 3 x coats to top sheet
and 1.5" edges...on all 4 x sides.


I just did a light sanding with a 120 grit sponge type sander..where the 2'x4' sheet was cut down to a pair of 21" x 22.75" sheets.
Then did a light sanding with 220 grit sponge sander. It all came out damned good.


Next up is to drill out the pair of 4" x 16" AL channels. Then get correct length 3/8" SS bolt hardware.
Choke gets installed at bottom of new 24" wide rack. Gets installed 1st. I need all the room I can get, to slide the asy in there. At least the front, back, both sides are quick release.


Jim VE7RF

scroll to very top. sad news. time to migrate to groups.io and fast.


Jim

VE7RF

I fill all the air voids with DC-4. Twenty years and no water
intrusion on a combination of connectors ranging from low band 259s to
a UHF array With "N" connectors. I'm either very lucky or it's not a
problem.
Don W4DNR

Quoting "jim.thom@... [ham_amplifiers]"
<ham_amplifiers@...>:

I buy....'dielectric grease' from local auto parts store. Use
sparingly on pin of coax plugs..and shield threads. Wipe off
any excess. Don't use it to fill air voids, like on type N
or 7-16 din.

I can't tell any difference between auto dielectric grease and
Dow dc 3/4... except the auto stuff has higher V stand off.


Jim VE7RF

I buy....'dielectric grease' from local auto parts store. Use sparingly on pin of coax plugs..and shield threads. Wipe off any excess. Don't use it to fill air voids, like on type N or 7-16 din.

I can't tell any difference between auto dielectric grease and Dow dc 3/4... except the auto stuff has higher V stand off.


Jim VE7RF

I use Dow Corning's (Now just Dow Chemical ... Following merger and
buyout) DC4 dielectric compound. It is a Silicone grease developed in
WWII to seal spark plugs on B17s to prevent arcing at connections at
high altitude. It remains a grease (never hardens) EXCEPT when subjected
to an arc which causes it to decompose leaving Silicon Dioxide (powdered
Quartz) behind as do all brands of Silicon dielectric greases. It used
to be expensive, but with competition the price has come down.
With Dow buying out Corning's stake it's now just another part of Dow
Chemical so I'm not sure what's available.
All their Specialty items including RTVs have become commodities with
substantial price reductions. I retired from DC in 1997 So have little
current information. As I recall, it has an infinite shelf life even
after the tube has been opened.
AFAIK all Silicone greases are pretty much the same regardless of who
makes it.

73, Roger (K8RI)

On 8/28/2019 5:31 AM, Alek Petkovic vk6apk@... [ham_amplifiers]
wrote:

Does anybody know where to get "Stuff?"

I'm talking about the goo that you put in coax connector joins, which
fills the void in the connection and seals out any moisture.

A Google search has come up blank.

73 and thanks,
Alek.

--
From sunny Binningup

Family Businesses:
SP Electrical. www.spelectrical.net.au
The Velvet Fox.
Smart Design Electrical.
Perth Interiors.

Does anybody know where to get "Stuff?"

I'm talking about the goo that you put in coax connector joins, which
fills the void in the connection and seals out any moisture.

A Google search has come up blank.

73 and thanks,
Alek.

--
From sunny Binningup

Family Businesses:
SP Electrical. www.spelectrical.net.au
The Velvet Fox.
Smart Design Electrical.
Perth Interiors.

----- Original Message -----

From: Gudguyham@... [ham_amplifiers]

To: ham_amplifiers@...

Sent: Saturday, August 31, 2019 6:44 AM

Subject: Re: [ham_amplifiers] FL-2100Z Mods

?

Alek, I’d?check and see what Tom W8JI recommends at his web page for those amps. ?I’d also consider if any of the rest of the mods are a good idea as well. ?I know some are ok but some are also questionable. ?Lou

Sent from AOL Mobile Mail
Get the new AOL app:

On?Friday, August 30, 2019,?Alek Petkovic vk6apk@... [ham_amplifiers]?<ham_amplifiers@...>?wrote:

?

A local ham dropped in a Yaesu FL-2100Z amp tp me and said that he would
like all the PA0FRI mods done to it.

See http://www.pa0fri.com/

This is no big problem, as most of the mods are common sense and they
are what one would normally do to an amp.

However, there is one mod that strikes me as odd.

He suggests cutting the grounding wires on VC1, the plate tune
capacitor, and running a thick wire or coax from the cold side of VC1 to
a ground point at the base of one of the 572B sockets.

This seems very odd to me. I don't see how this would enhance stability,
having that grounding wire running all that way.

Every amp I have seen or built, has the cold end of the capacitor bonded
to the nearest point on the chassis.

Should one be doing this mod? My feeling is that it should be left alone.

Opinions appreciated.

Thanks, Alek.
VK6APK

--
From sunny Binningup

Family Businesses:
SP Electrical. www.spelectrical.net.au
The Velvet Fox. https://www.facebook.com/TheVelvetFox/
Smart Design Electrical. https://www.facebook.com/smartdesignelectrical/
Perth Interiors. https://www.instagram.com/perthinteriors/

Virus-free.

?

A local ham dropped in a Yaesu FL-2100Z amp tp me and said that he would
like all the PA0FRI mods done to it.

See http://www.pa0fri.com/

This is no big problem, as most of the mods are common sense and they
are what one would normally do to an amp.

However, there is one mod that strikes me as odd.

He suggests cutting the grounding wires on VC1, the plate tune
capacitor, and running a thick wire or coax from the cold side of VC1 to
a ground point at the base of one of the 572B sockets.

This seems very odd to me. I don't see how this would enhance stability,
having that grounding wire running all that way.

Every amp I have seen or built, has the cold end of the capacitor bonded
to the nearest point on the chassis.

Should one be doing this mod? My feeling is that it should be left alone.

Opinions appreciated.

Thanks, Alek.
VK6APK

--
From sunny Binningup

Family Businesses:
SP Electrical. www.spelectrical.net.au
The Velvet Fox. https://www.facebook.com/TheVelvetFox/
Smart Design Electrical. https://www.facebook.com/smartdesignelectrical/
Perth Interiors. https://www.instagram.com/perthinteriors/

?

GN, I've made some mods to 2100B, 2100Z, etc., several.

I have never made that specific mod, all amps worked fine and stable.

What I usually do is to add extra decoupling caps in plate choke base
(4400 pF extra), plus one 1000 pF before glitch resistor; 15 ohm 10 watt
glitch resistor at rectifiers pcb; increase grid caps upto 1000 pF; back
to back 1N5408 diodes (at shunt's place).

General cleaning, resolder and checking bias pcb caps and resistor
values, lube fan motors, checking SWR diodes and its compensation, etc.

You can add in parallel the extra, not used contacts at RL1 (I ask
myself why they didn't).

Don't forget to check the HV capacitors inside the tube's cage, some may
be cracked (see the attached image).

If you need extra parameters, ratings at half and full voltage, email me.

Regards
Guillermo - LU5WE.

El 30/8/19 a las 21:18, Alek Petkovic vk6apk@...
[ham_amplifiers] escribió:
> ?
>
> A local ham dropped in a Yaesu FL-2100Z amp tp me and said that he would
> like all the PA0FRI mods done to it.
>
> See
>
> This is no big problem, as most of the mods are common sense and they
> are what one would normally do to an amp.
>
> However, there is one mod that strikes me as odd.
>
> He suggests cutting the grounding wires on VC1, the plate tune
> capacitor, and running a thick wire or coax from the cold side of VC1 to
> a ground point at the base of one of the 572B sockets.
>
> This seems very odd to me. I don't see how this would enhance stability,
> having that grounding wire running all that way.
>
> Every amp I have seen or built, has the cold end of the capacitor bonded
> to the nearest point on the chassis.
>
> Should one be doing this mod? My feeling is that it should be left alone.
>
> Opinions appreciated.
>
> Thanks, Alek.
> VK6APK
>
> --
> From sunny Binningup
>
> Family Businesses:
> SP Electrical.
> The Velvet Fox.
> Smart Design Electrical.
> Perth Interiors.
>
>